diff --git a/include/llvm/IR/CallSite.h b/include/llvm/IR/CallSite.h
index 39cb461f090..9847e70050b 100644
--- a/include/llvm/IR/CallSite.h
+++ b/include/llvm/IR/CallSite.h
@@ -160,9 +160,6 @@ public:
   ///
   FunTy *getCaller() const { return (*this)->getParent()->getParent(); }
 
-  /// \brief Tests if this is a tail call.  Only a CallInst can be a tail call.
-  bool isTailCall() const { return isCall() && cast<CallInst>->isTailCall(); }
-
   /// \brief Tests if this call site must be tail call optimized.  Only a
   /// CallInst can be tail call optimized.
   bool isMustTailCall() const {