diff --git a/src/SD.cpp b/src/SD.cpp
index e97256c..423db45 100644
--- a/src/SD.cpp
+++ b/src/SD.cpp
@@ -455,7 +455,7 @@ namespace SDLib {
 
     */
 
-    int pathidx;
+    int pathidx = 0;
 
     // do the interactive search
     SdFile parentdir = getParentDir(filepath, &pathidx);