diff --git a/SDWebImage/SDWebImageCompat.h b/SDWebImage/SDWebImageCompat.h
index a11f3916..ae6aed87 100644
--- a/SDWebImage/SDWebImageCompat.h
+++ b/SDWebImage/SDWebImageCompat.h
@@ -107,7 +107,7 @@ extern NSString *const SDWebImageErrorDomain;
     }
 
 #define dispatch_main_async_safe(block)\
-    if ([NSThread isMainThread]) {\
+    if (strcmp(dispatch_queue_get_label(DISPATCH_CURRENT_QUEUE_LABEL), dispatch_queue_get_label(dispatch_get_main_queue())) == 0) {\
         block();\
     } else {\
         dispatch_async(dispatch_get_main_queue(), block);\