diff --git a/reactos/lib/atl/atlbase.h b/reactos/lib/atl/atlbase.h
index 1ddea8e580f..597dc71a726 100644
--- a/reactos/lib/atl/atlbase.h
+++ b/reactos/lib/atl/atlbase.h
@@ -248,9 +248,9 @@ inline BOOL WINAPI InlineIsEqualGUID(REFGUID rguid1, REFGUID rguid2)
 {
    return (
 	  ((unsigned long *)&rguid1)[0] == ((unsigned long *)&rguid2)[0] &&
-	  ((unsigned long *)&rguid1)[1] == ((unsigned long *)&rguid1)[1] &&
-	  ((unsigned long *)&rguid1)[2] == ((unsigned long *)&rguid1)[2] &&
-	  ((unsigned long *)&rguid1)[3] == ((unsigned long *)&rguid1)[3]);
+	  ((unsigned long *)&rguid1)[1] == ((unsigned long *)&rguid2)[1] &&
+	  ((unsigned long *)&rguid1)[2] == ((unsigned long *)&rguid2)[2] &&
+	  ((unsigned long *)&rguid1)[3] == ((unsigned long *)&rguid2)[3]);
 }
 
 class CComMultiThreadModelNoCS