diff --git a/TelegramCore.xcodeproj/project.pbxproj b/TelegramCore.xcodeproj/project.pbxproj
index 3fd3485461..9954255401 100644
--- a/TelegramCore.xcodeproj/project.pbxproj
+++ b/TelegramCore.xcodeproj/project.pbxproj
@@ -2765,6 +2765,7 @@
 				DYLIB_CURRENT_VERSION = 1;
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				FRAMEWORK_VERSION = A;
+				GCC_OPTIMIZATION_LEVEL = 0;
 				INFOPLIST_FILE = TelegramCoreMac/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks @loader_path/Frameworks";