diff --git a/engine/src/flutter/shell/platform/darwin/macos/framework/Source/FlutterViewController.mm b/engine/src/flutter/shell/platform/darwin/macos/framework/Source/FlutterViewController.mm
index 2ea2070a1f7..8492d902ff7 100644
--- a/engine/src/flutter/shell/platform/darwin/macos/framework/Source/FlutterViewController.mm
+++ b/engine/src/flutter/shell/platform/darwin/macos/framework/Source/FlutterViewController.mm
@@ -522,14 +522,12 @@ static void CommonInit(FlutterViewController* controller) {
 }
 
 - (void)flagsChanged:(NSEvent*)event {
-  NSUInteger currentlyPressedFlags =
-      event.modifierFlags & NSEventModifierFlagDeviceIndependentFlagsMask;
-  if (currentlyPressedFlags < _keyboardState.previously_pressed_flags) {
+  if (event.modifierFlags < _keyboardState.previously_pressed_flags) {
     [self keyUp:event];
   } else {
     [self keyDown:event];
   }
-  _keyboardState.previously_pressed_flags = currentlyPressedFlags;
+  _keyboardState.previously_pressed_flags = event.modifierFlags;
 }
 
 - (void)mouseEntered:(NSEvent*)event {