diff --git a/UPGRADING.INTERNALS b/UPGRADING.INTERNALS
index c491f83d5c9bb..a86af2d98ce31 100644
--- a/UPGRADING.INTERNALS
+++ b/UPGRADING.INTERNALS
@@ -138,6 +138,8 @@ PHP 8.4 INTERNALS UPGRADE NOTES
    - M4 macro PHP_CHECK_GCC_ARG has been removed since PHP 8.0 (use
      AX_CHECK_COMPILE_FLAG).
    - Added php-config --lib-dir and --lib-embed options for PHP embed SAPI.
+   - PDO extensions in php-src don't have the include flag -I$pdo_cv_inc_path
+     directory anymore.
 
  c. Windows build system changes
    - The configure options --with-oci8-11g, --with-oci8-12c, --with-oci8-19 have
diff --git a/ext/pdo_dblib/config.m4 b/ext/pdo_dblib/config.m4
index 993ca3d6033af..3cbadfee05c8b 100644
--- a/ext/pdo_dblib/config.m4
+++ b/ext/pdo_dblib/config.m4
@@ -44,7 +44,7 @@ if test "$PHP_PDO_DBLIB" != "no"; then
   PHP_CHECK_PDO_INCLUDES
 
   PDO_DBLIB_DEFS="-DPDO_DBLIB_FLAVOUR=\\\"freetds\\\""
-  PHP_NEW_EXTENSION(pdo_dblib, pdo_dblib.c dblib_driver.c dblib_stmt.c, $ext_shared,,-I$pdo_cv_inc_path $PDO_DBLIB_DEFS -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1)
+  PHP_NEW_EXTENSION(pdo_dblib, pdo_dblib.c dblib_driver.c dblib_stmt.c, $ext_shared,, $PDO_DBLIB_DEFS -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1)
   PHP_SUBST(PDO_DBLIB_SHARED_LIBADD)
 
   PHP_ADD_EXTENSION_DEP(pdo_dblib, pdo)
diff --git a/ext/pdo_dblib/dblib_driver.c b/ext/pdo_dblib/dblib_driver.c
index 72008c14e0df5..cfce8c5046130 100644
--- a/ext/pdo_dblib/dblib_driver.c
+++ b/ext/pdo_dblib/dblib_driver.c
@@ -22,8 +22,8 @@
 #include "php.h"
 #include "php_ini.h"
 #include "ext/standard/info.h"
-#include "pdo/php_pdo.h"
-#include "pdo/php_pdo_driver.h"
+#include "ext/pdo/php_pdo.h"
+#include "ext/pdo/php_pdo_driver.h"
 #include "php_pdo_dblib.h"
 #include "php_pdo_dblib_int.h"
 #include "zend_exceptions.h"
diff --git a/ext/pdo_dblib/dblib_stmt.c b/ext/pdo_dblib/dblib_stmt.c
index c16eb07c59604..e6e91b60fa273 100644
--- a/ext/pdo_dblib/dblib_stmt.c
+++ b/ext/pdo_dblib/dblib_stmt.c
@@ -22,8 +22,8 @@
 #include "php.h"
 #include "php_ini.h"
 #include "ext/standard/info.h"
-#include "pdo/php_pdo.h"
-#include "pdo/php_pdo_driver.h"
+#include "ext/pdo/php_pdo.h"
+#include "ext/pdo/php_pdo_driver.h"
 #include "php_pdo_dblib.h"
 #include "php_pdo_dblib_int.h"
 #include "zend_exceptions.h"
diff --git a/ext/pdo_dblib/pdo_dblib.c b/ext/pdo_dblib/pdo_dblib.c
index 7a1586f8a5f2c..b16208fbd8e78 100644
--- a/ext/pdo_dblib/pdo_dblib.c
+++ b/ext/pdo_dblib/pdo_dblib.c
@@ -22,8 +22,8 @@
 #include "php.h"
 #include "php_ini.h"
 #include "ext/standard/info.h"
-#include "pdo/php_pdo.h"
-#include "pdo/php_pdo_driver.h"
+#include "ext/pdo/php_pdo.h"
+#include "ext/pdo/php_pdo_driver.h"
 #include "php_pdo_dblib.h"
 #include "php_pdo_dblib_int.h"
 #include "zend_exceptions.h"
diff --git a/ext/pdo_firebird/config.m4 b/ext/pdo_firebird/config.m4
index d4a245d5a904b..b8352ec997a01 100644
--- a/ext/pdo_firebird/config.m4
+++ b/ext/pdo_firebird/config.m4
@@ -60,7 +60,7 @@ if test "$PHP_PDO_FIREBIRD" != "no"; then
 
   PHP_CHECK_PDO_INCLUDES
 
-  PHP_NEW_EXTENSION(pdo_firebird, pdo_firebird.c firebird_driver.c firebird_statement.c, $ext_shared,,-I$pdo_cv_inc_path)
+  PHP_NEW_EXTENSION(pdo_firebird, pdo_firebird.c firebird_driver.c firebird_statement.c, $ext_shared)
   PHP_SUBST(PDO_FIREBIRD_SHARED_LIBADD)
   PHP_ADD_EXTENSION_DEP(pdo_firebird, pdo)
 fi
diff --git a/ext/pdo_firebird/firebird_driver.c b/ext/pdo_firebird/firebird_driver.c
index 88c6b8efa9bff..8d62936bb37b9 100644
--- a/ext/pdo_firebird/firebird_driver.c
+++ b/ext/pdo_firebird/firebird_driver.c
@@ -26,8 +26,8 @@
 #include "zend_exceptions.h"
 #include "php_ini.h"
 #include "ext/standard/info.h"
-#include "pdo/php_pdo.h"
-#include "pdo/php_pdo_driver.h"
+#include "ext/pdo/php_pdo.h"
+#include "ext/pdo/php_pdo_driver.h"
 #include "php_pdo_firebird.h"
 #include "php_pdo_firebird_int.h"
 
diff --git a/ext/pdo_firebird/firebird_statement.c b/ext/pdo_firebird/firebird_statement.c
index 0b825df6bf210..25b965b796dd4 100644
--- a/ext/pdo_firebird/firebird_statement.c
+++ b/ext/pdo_firebird/firebird_statement.c
@@ -21,8 +21,8 @@
 #include "php.h"
 #include "php_ini.h"
 #include "ext/standard/info.h"
-#include "pdo/php_pdo.h"
-#include "pdo/php_pdo_driver.h"
+#include "ext/pdo/php_pdo.h"
+#include "ext/pdo/php_pdo_driver.h"
 #include "php_pdo_firebird.h"
 #include "php_pdo_firebird_int.h"
 
diff --git a/ext/pdo_firebird/pdo_firebird.c b/ext/pdo_firebird/pdo_firebird.c
index 9f62e75eacc53..ce4c6d69102ff 100644
--- a/ext/pdo_firebird/pdo_firebird.c
+++ b/ext/pdo_firebird/pdo_firebird.c
@@ -21,8 +21,8 @@
 #include "php.h"
 #include "php_ini.h"
 #include "ext/standard/info.h"
-#include "pdo/php_pdo.h"
-#include "pdo/php_pdo_driver.h"
+#include "ext/pdo/php_pdo.h"
+#include "ext/pdo/php_pdo_driver.h"
 #include "php_pdo_firebird.h"
 #include "php_pdo_firebird_int.h"
 #include "pdo_firebird_arginfo.h"
diff --git a/ext/pdo_mysql/config.m4 b/ext/pdo_mysql/config.m4
index 1c7c654af82c3..122376bdc02b6 100644
--- a/ext/pdo_mysql/config.m4
+++ b/ext/pdo_mysql/config.m4
@@ -85,7 +85,7 @@ if test "$PHP_PDO_MYSQL" != "no"; then
     AC_DEFINE_UNQUOTED(PDO_MYSQL_UNIX_ADDR, "$PDO_MYSQL_SOCKET", [ ])
   fi
 
-  PHP_NEW_EXTENSION(pdo_mysql, pdo_mysql.c mysql_driver.c mysql_statement.c, $ext_shared,,-I$pdo_cv_inc_path -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1)
+  PHP_NEW_EXTENSION(pdo_mysql, pdo_mysql.c mysql_driver.c mysql_statement.c, $ext_shared,, -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1)
 
   PHP_ADD_EXTENSION_DEP(pdo_mysql, pdo)
 
diff --git a/ext/pdo_mysql/mysql_driver.c b/ext/pdo_mysql/mysql_driver.c
index 3295b67aa90fc..95d5450046726 100644
--- a/ext/pdo_mysql/mysql_driver.c
+++ b/ext/pdo_mysql/mysql_driver.c
@@ -23,8 +23,8 @@
 #include "php.h"
 #include "php_ini.h"
 #include "ext/standard/info.h"
-#include "pdo/php_pdo.h"
-#include "pdo/php_pdo_driver.h"
+#include "ext/pdo/php_pdo.h"
+#include "ext/pdo/php_pdo_driver.h"
 #include "php_pdo_mysql.h"
 #include "php_pdo_mysql_int.h"
 #ifndef PDO_USE_MYSQLND
diff --git a/ext/pdo_mysql/mysql_statement.c b/ext/pdo_mysql/mysql_statement.c
index c4f86b0e7d320..b4b7c8ecb6040 100644
--- a/ext/pdo_mysql/mysql_statement.c
+++ b/ext/pdo_mysql/mysql_statement.c
@@ -23,8 +23,8 @@
 #include "php.h"
 #include "php_ini.h"
 #include "ext/standard/info.h"
-#include "pdo/php_pdo.h"
-#include "pdo/php_pdo_driver.h"
+#include "ext/pdo/php_pdo.h"
+#include "ext/pdo/php_pdo_driver.h"
 #include "php_pdo_mysql.h"
 #include "php_pdo_mysql_int.h"
 
diff --git a/ext/pdo_mysql/pdo_mysql.c b/ext/pdo_mysql/pdo_mysql.c
index 469761abd92e0..cdf4b03d0f8d0 100644
--- a/ext/pdo_mysql/pdo_mysql.c
+++ b/ext/pdo_mysql/pdo_mysql.c
@@ -22,8 +22,8 @@
 #include "php.h"
 #include "php_ini.h"
 #include "ext/standard/info.h"
-#include "pdo/php_pdo.h"
-#include "pdo/php_pdo_driver.h"
+#include "ext/pdo/php_pdo.h"
+#include "ext/pdo/php_pdo_driver.h"
 #include "php_pdo_mysql.h"
 #include "php_pdo_mysql_int.h"
 #include "pdo_mysql_arginfo.h"
diff --git a/ext/pdo_odbc/config.m4 b/ext/pdo_odbc/config.m4
index 60a692647d4d7..0feb0bb230cf0 100644
--- a/ext/pdo_odbc/config.m4
+++ b/ext/pdo_odbc/config.m4
@@ -131,7 +131,7 @@ functions required for PDO support.
     AC_MSG_ERROR([Your ODBC library does not exist or there was an error. Check config.log for more information])
   ], $PDO_ODBC_LDFLAGS)
 
-  PHP_NEW_EXTENSION(pdo_odbc, pdo_odbc.c odbc_driver.c odbc_stmt.c, $ext_shared,,-I$pdo_cv_inc_path $PDO_ODBC_INCLUDE)
+  PHP_NEW_EXTENSION(pdo_odbc, pdo_odbc.c odbc_driver.c odbc_stmt.c, $ext_shared,, $PDO_ODBC_INCLUDE)
   PHP_SUBST(PDO_ODBC_SHARED_LIBADD)
   PHP_ADD_EXTENSION_DEP(pdo_odbc, pdo)
 fi
diff --git a/ext/pdo_odbc/odbc_driver.c b/ext/pdo_odbc/odbc_driver.c
index 9e5c6eb7d5431..d991b8dc5fe17 100644
--- a/ext/pdo_odbc/odbc_driver.c
+++ b/ext/pdo_odbc/odbc_driver.c
@@ -21,8 +21,8 @@
 #include "php.h"
 #include "php_ini.h"
 #include "ext/standard/info.h"
-#include "pdo/php_pdo.h"
-#include "pdo/php_pdo_driver.h"
+#include "ext/pdo/php_pdo.h"
+#include "ext/pdo/php_pdo_driver.h"
 /* this file actually lives in main/ */
 #include "php_odbc_utils.h"
 #include "php_pdo_odbc.h"
diff --git a/ext/pdo_odbc/odbc_stmt.c b/ext/pdo_odbc/odbc_stmt.c
index ea0dd0e53aac6..00901e10af47c 100644
--- a/ext/pdo_odbc/odbc_stmt.c
+++ b/ext/pdo_odbc/odbc_stmt.c
@@ -21,8 +21,8 @@
 #include "php.h"
 #include "php_ini.h"
 #include "ext/standard/info.h"
-#include "pdo/php_pdo.h"
-#include "pdo/php_pdo_driver.h"
+#include "ext/pdo/php_pdo.h"
+#include "ext/pdo/php_pdo_driver.h"
 #include "php_pdo_odbc.h"
 #include "php_pdo_odbc_int.h"
 
diff --git a/ext/pdo_odbc/pdo_odbc.c b/ext/pdo_odbc/pdo_odbc.c
index 675776fb90837..40303609b3bf6 100644
--- a/ext/pdo_odbc/pdo_odbc.c
+++ b/ext/pdo_odbc/pdo_odbc.c
@@ -21,8 +21,8 @@
 #include "php.h"
 #include "php_ini.h"
 #include "ext/standard/info.h"
-#include "pdo/php_pdo.h"
-#include "pdo/php_pdo_driver.h"
+#include "ext/pdo/php_pdo.h"
+#include "ext/pdo/php_pdo_driver.h"
 #include "php_pdo_odbc.h"
 #include "php_pdo_odbc_int.h"
 #include "pdo_odbc_arginfo.h"
diff --git a/ext/pdo_pgsql/config.m4 b/ext/pdo_pgsql/config.m4
index a21b11106bab1..492a2e8b66a4d 100644
--- a/ext/pdo_pgsql/config.m4
+++ b/ext/pdo_pgsql/config.m4
@@ -79,6 +79,6 @@ if test "$PHP_PDO_PGSQL" != "no"; then
 
   PHP_CHECK_PDO_INCLUDES
 
-  PHP_NEW_EXTENSION(pdo_pgsql, pdo_pgsql.c pgsql_driver.c pgsql_statement.c, $ext_shared,,-I$pdo_cv_inc_path)
+  PHP_NEW_EXTENSION(pdo_pgsql, pdo_pgsql.c pgsql_driver.c pgsql_statement.c, $ext_shared)
   PHP_ADD_EXTENSION_DEP(pdo_pgsql, pdo)
 fi
diff --git a/ext/pdo_pgsql/pdo_pgsql.c b/ext/pdo_pgsql/pdo_pgsql.c
index d9858d7bebcea..77544d272d408 100644
--- a/ext/pdo_pgsql/pdo_pgsql.c
+++ b/ext/pdo_pgsql/pdo_pgsql.c
@@ -21,9 +21,9 @@
 #include "php.h"
 #include "php_ini.h"
 #include "ext/standard/info.h"
-#include "pdo/php_pdo.h"
-#include "pdo/php_pdo_error.h"
-#include "pdo/php_pdo_driver.h"
+#include "ext/pdo/php_pdo.h"
+#include "ext/pdo/php_pdo_error.h"
+#include "ext/pdo/php_pdo_driver.h"
 #include "php_pdo_pgsql.h"
 #include "php_pdo_pgsql_int.h"
 #include "pdo_pgsql_arginfo.h"
diff --git a/ext/pdo_pgsql/pgsql_driver.c b/ext/pdo_pgsql/pgsql_driver.c
index 42e0c307d6394..41d9fa85e5193 100644
--- a/ext/pdo_pgsql/pgsql_driver.c
+++ b/ext/pdo_pgsql/pgsql_driver.c
@@ -24,9 +24,9 @@
 #include "php_ini.h"
 #include "ext/standard/php_string.h" /* For php_addcslashes_str() in _pdo_pgsql_escape_credentials() */
 #include "main/php_network.h"
-#include "pdo/php_pdo.h"
-#include "pdo/php_pdo_driver.h"
-#include "pdo/php_pdo_error.h"
+#include "ext/pdo/php_pdo.h"
+#include "ext/pdo/php_pdo_driver.h"
+#include "ext/pdo/php_pdo_error.h"
 #include "ext/standard/file.h"
 #include "php_pdo_pgsql.h"
 #include "php_pdo_pgsql_int.h"
@@ -1250,14 +1250,14 @@ PHP_METHOD(PDO_PGSql_Ext, pgsqlSetNoticeCallback)
 	if (FAILURE == zend_parse_parameters(ZEND_NUM_ARGS(), "F!", &fci, &fcc)) {
 		RETURN_THROWS();
 	}
-	
+
 	pdo_dbh_t *dbh = Z_PDO_DBH_P(ZEND_THIS);
 	PDO_CONSTRUCT_CHECK;
-	
+
 	pdo_pgsql_db_handle *H = (pdo_pgsql_db_handle *)dbh->driver_data;
-	
+
 	pdo_pgsql_cleanup_notice_callback(H);
-	
+
 	if (ZEND_FCC_INITIALIZED(fcc)) {
 		H->notice_callback = emalloc(sizeof(zend_fcall_info_cache));
 		zend_fcc_dup(H->notice_callback, &fcc);
diff --git a/ext/pdo_pgsql/pgsql_statement.c b/ext/pdo_pgsql/pgsql_statement.c
index 7843902a9a3aa..1b2a59e4852a2 100644
--- a/ext/pdo_pgsql/pgsql_statement.c
+++ b/ext/pdo_pgsql/pgsql_statement.c
@@ -23,8 +23,8 @@
 #include "php.h"
 #include "php_ini.h"
 #include "ext/standard/info.h"
-#include "pdo/php_pdo.h"
-#include "pdo/php_pdo_driver.h"
+#include "ext/pdo/php_pdo.h"
+#include "ext/pdo/php_pdo_driver.h"
 #include "php_pdo_pgsql.h"
 #include "php_pdo_pgsql_int.h"
 #ifdef HAVE_NETINET_IN_H
diff --git a/ext/pdo_sqlite/config.m4 b/ext/pdo_sqlite/config.m4
index bd4e51bf7f731..62c738f01e80f 100644
--- a/ext/pdo_sqlite/config.m4
+++ b/ext/pdo_sqlite/config.m4
@@ -30,7 +30,7 @@ if test "$PHP_PDO_SQLITE" != "no"; then
 
   PHP_SUBST(PDO_SQLITE_SHARED_LIBADD)
   PHP_NEW_EXTENSION(pdo_sqlite, pdo_sqlite.c sqlite_driver.c sqlite_statement.c,
-    $ext_shared,,-I$pdo_cv_inc_path)
+    $ext_shared)
 
   PHP_ADD_EXTENSION_DEP(pdo_sqlite, pdo)
 fi
diff --git a/ext/pdo_sqlite/pdo_sqlite.c b/ext/pdo_sqlite/pdo_sqlite.c
index 852f0310f7501..49a477998b020 100644
--- a/ext/pdo_sqlite/pdo_sqlite.c
+++ b/ext/pdo_sqlite/pdo_sqlite.c
@@ -22,8 +22,8 @@
 #include "php_ini.h"
 #include "ext/standard/info.h"
 #include "SAPI.h"
-#include "pdo/php_pdo.h"
-#include "pdo/php_pdo_driver.h"
+#include "ext/pdo/php_pdo.h"
+#include "ext/pdo/php_pdo_driver.h"
 #include "php_pdo_sqlite.h"
 #include "php_pdo_sqlite_int.h"
 #include "zend_exceptions.h"
diff --git a/ext/pdo_sqlite/sqlite_driver.c b/ext/pdo_sqlite/sqlite_driver.c
index 4d2d9280cef9b..76e82cc2e6151 100644
--- a/ext/pdo_sqlite/sqlite_driver.c
+++ b/ext/pdo_sqlite/sqlite_driver.c
@@ -21,8 +21,8 @@
 #include "php.h"
 #include "php_ini.h"
 #include "ext/standard/info.h"
-#include "pdo/php_pdo.h"
-#include "pdo/php_pdo_driver.h"
+#include "ext/pdo/php_pdo.h"
+#include "ext/pdo/php_pdo_driver.h"
 #include "php_pdo_sqlite.h"
 #include "php_pdo_sqlite_int.h"
 #include "zend_exceptions.h"
diff --git a/ext/pdo_sqlite/sqlite_statement.c b/ext/pdo_sqlite/sqlite_statement.c
index c6b907f6fc22f..77bc65a4f09fc 100644
--- a/ext/pdo_sqlite/sqlite_statement.c
+++ b/ext/pdo_sqlite/sqlite_statement.c
@@ -21,8 +21,8 @@
 #include "php.h"
 #include "php_ini.h"
 #include "ext/standard/info.h"
-#include "pdo/php_pdo.h"
-#include "pdo/php_pdo_driver.h"
+#include "ext/pdo/php_pdo.h"
+#include "ext/pdo/php_pdo_driver.h"
 #include "php_pdo_sqlite.h"
 #include "php_pdo_sqlite_int.h"