diff --git a/configure b/configure
index b584c44d8a..9d36ddc6f2 100755
--- a/configure
+++ b/configure
@@ -4880,6 +4880,12 @@ case "${host}" in
 	abi="elf"
 	$as_echo "#define JEMALLOC_PURGE_MADVISE_FREE  " >>confdefs.h
 
+	;;
+  *-*-bitrig*)
+	CFLAGS="$CFLAGS"
+	abi="elf"
+	$as_echo "#define JEMALLOC_PURGE_MADVISE_FREE  " >>confdefs.h
+
 	;;
   *-*-linux*)
 	CFLAGS="$CFLAGS"
diff --git a/configure.ac b/configure.ac
index e4afe88906..07c7e4fb62 100644
--- a/configure.ac
+++ b/configure.ac
@@ -288,6 +288,11 @@ case "${host}" in
 	abi="elf"
 	AC_DEFINE([JEMALLOC_PURGE_MADVISE_FREE], [ ])
 	;;
+  *-*-bitrig*)
+	CFLAGS="$CFLAGS"
+	abi="elf"
+	AC_DEFINE([JEMALLOC_PURGE_MADVISE_FREE], [ ])
+	;;
   *-*-linux*)
 	CFLAGS="$CFLAGS"
 	CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE"