diff --git a/src/lib/image.h b/src/lib/image.h
index 3590386..3da397d 100644
--- a/src/lib/image.h
+++ b/src/lib/image.h
@@ -190,6 +190,6 @@ __hidden void              __imlib_SaveImage(ImlibImage *im, const char *file,
 
 # define IMAGE_DIMENSIONS_OK(w, h) \
    ( ((w) > 0) && ((h) > 0) && \
-     ((unsigned long long)(w) * (unsigned long long)(w) <= (1ULL << 29) - 1) )
+     ((unsigned long long)(w) * (unsigned long long)(h) <= (1ULL << 29) - 1) )
 
 #endif