diff --git a/loaders/loader_png.c b/loaders/loader_png.c
index f226e4f..6803ebc 100644
--- a/loaders/loader_png.c
+++ b/loaders/loader_png.c
@@ -254,6 +254,9 @@ save(ImlibImage * im, ImlibProgressFunction progress, char progress_granularity)
    ImlibImageTag      *tag;
    int                 quality = 75, compression = 3, num_passes = 1, pass;
 
+   if (!im->data)
+      return 0;
+
    f = fopen(im->real_file, "wb");
    if (!f)
       return 0;