diff --git a/CMakeLists.txt b/CMakeLists.txt
index fd7834f..1d86d04 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -65,7 +65,7 @@ if(APPLE)
     if(EXISTS "${APP_ICON}")
         add_executable(tetris MACOSX_BUNDLE ${TETRIS_SOURCES} "${APP_ICON}")
         set_source_files_properties("${APP_ICON}" PROPERTIES MACOSX_PACKAGE_LOCATION "Resources")
-        set_target_properties(tetris PROPERTIES MACOSX_BUNDLE_ICON_FILE "AppIcon.icns")
+        set_target_properties(tetris PROPERTIES MACOSX_BUNDLE_ICON_FILE "AppIcon")
     else()
         message(WARNING "App icon not found at ${APP_ICON}; bundle will use default icon")
         add_executable(tetris MACOSX_BUNDLE ${TETRIS_SOURCES})