iOS Facebook SDK Linking with Unity on Simulator Issue

Currently getting the following when trying to link for the simulator, works fine on hardware. Using the latest Facebook SDK.

Undefined symbols for architecture i386:
 "_UnityGetGLViewController", referenced from:
  _FBNativeAdClick in FBAudienceNetwork(FBNativeAdCBridge.o)
ld: symbol(s) not found for architecture i386

Anyone else have seen this?