diff --git a/include/llvm/Target/TargetMachine.h b/include/llvm/Target/TargetMachine.h
index cd43532fb65..1ffaeb0c143 100644
--- a/include/llvm/Target/TargetMachine.h
+++ b/include/llvm/Target/TargetMachine.h
@@ -124,8 +124,8 @@ public:
   template<typename STC> const STC &getSubtarget() const {
     return *static_cast<const STC*>(getSubtargetImpl());
   }
-  template <typename STC> const STC &getSubtarget(const Function &) const {
-    return *static_cast<const STC*>(getSubtargetImpl());
+  template <typename STC> const STC &getSubtarget(const Function &F) const {
+    return *static_cast<const STC*>(getSubtargetImpl(F));
   }
 
   /// getDataLayout - This method returns a pointer to the DataLayout for