diff --git a/YYWebImage/YYWebImageOperation.m b/YYWebImage/YYWebImageOperation.m
index 30ac1eb..1aab6c0 100644
--- a/YYWebImage/YYWebImageOperation.m
+++ b/YYWebImage/YYWebImageOperation.m
@@ -689,6 +689,7 @@ - (void)connectionDidFinishLoading:(NSURLConnection *)connection {
                     } break;
                 }
                 if ([self isCancelled]) return;
+                if (!image) return;
                 
                 if (self.transform && image) {
                     UIImage *newImage = self.transform(image, self.request.URL);