diff --git a/td/telegram/PhotoSizeType.h b/td/telegram/PhotoSizeType.h
index bcf639dddd1b..cc51d505bc4c 100644
--- a/td/telegram/PhotoSizeType.h
+++ b/td/telegram/PhotoSizeType.h
@@ -33,15 +33,15 @@ inline bool operator==(const PhotoSizeType &lhs, const PhotoSizeType &rhs) {
 }
 
 inline bool operator!=(const PhotoSizeType &lhs, char c) {
-  return lhs.type == c;
+  return !(lhs == c);
 }
 
 inline bool operator!=(const PhotoSizeType &lhs, int32 type) {
-  return lhs.type == type;
+  return !(lhs == type);
 }
 
 inline bool operator!=(const PhotoSizeType &lhs, const PhotoSizeType &rhs) {
-  return lhs.type != rhs.type;
+  return !(lhs == rhs);
 }
 
 inline StringBuilder &operator<<(StringBuilder &string_builder, const PhotoSizeType &photo_size_type) {