diff --git a/file.c b/file.c
index 87b3e9b0f2..b4286003e1 100644
--- a/file.c
+++ b/file.c
@@ -937,7 +937,7 @@ void dir_list_free(char **dir_list)
 bool path_is_directory(const char *path)
 {
 #ifdef _WIN32
-   return PathIsDirectory(buf) == FILE_ATTRIBUTE_DIRECTORY;
+   return PathIsDirectory(path) == FILE_ATTRIBUTE_DIRECTORY;
 #elif defined(__CELLOS_LV2__)
    return false; // STUB
 #elif defined(XENON)