diff --git a/talk/app/webrtc/objc/README b/talk/app/webrtc/objc/README
index 39b0931d9..abf6f65eb 100644
--- a/talk/app/webrtc/objc/README
+++ b/talk/app/webrtc/objc/README
@@ -7,6 +7,8 @@ Prerequisites:
   .gclient file should contain a line like:
   target_os = ['ios', 'mac']
   Make sure to re-run gclient sync after adding this to download the tools.
+  Note that until http://crbug.com/248168 is fixed one needs to do a gclient
+  sync with just 'mac' and then follow that with a sync with both.
 
 - Set up webrtc-related $GYP_DEFINES; example shell functions that set
   up for building for iOS-device, iOS-simulator, and Mac (resp) are: