1 files changed, 1 insertions, 1 deletions
diff --git a/src/png.c b/src/png.c
index 2aedc374..a1c3f3f1 100644
--- a/src/png.c
+++ b/src/png.c
@@ -471,6 +471,6 @@ void *a_Png_new(DilloImage *Image, DilloUrl *url, int version)
 
 void *a_Png_new() { return 0; }
 void a_Png_callback() { return; }
-const char *a_Png_version(void) { return NULL; }
+const char *a_Png_version(void) { return 0; }
 
 #endif /* ENABLE_PNG */