diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 05d55c8..6a15037 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -916,7 +916,7 @@
   { "disable-accelerated-video-decode",
     IDS_FLAGS_DISABLE_ACCELERATED_VIDEO_DECODE_NAME,
     IDS_FLAGS_DISABLE_ACCELERATED_VIDEO_DECODE_DESCRIPTION,
-    kOsWin | kOsCrOS,
+    kOsMac | kOsWin | kOsCrOS,
     SINGLE_VALUE_TYPE(switches::kDisableAcceleratedVideoDecode),
   },
 #if defined(USE_ASH)