diff --git a/vChewing.xcodeproj/project.pbxproj b/vChewing.xcodeproj/project.pbxproj
index f97b5b51..dc5e8f68 100644
--- a/vChewing.xcodeproj/project.pbxproj
+++ b/vChewing.xcodeproj/project.pbxproj
@@ -1490,6 +1490,7 @@
 					"$(OTHER_CFLAGS)",
 					"-fcxx-modules",
 				);
+				SWIFT_COMPILATION_MODE = wholemodule;
 			};
 			name = Release;
 		};