diff --git a/llvm/include/llvm/CodeGen/TargetLowering.h b/llvm/include/llvm/CodeGen/TargetLowering.h
index 98df5214d815ee..ef907d663f99dd 100644
--- a/llvm/include/llvm/CodeGen/TargetLowering.h
+++ b/llvm/include/llvm/CodeGen/TargetLowering.h
@@ -37,7 +37,6 @@
 #include "llvm/CodeGen/TargetCallingConv.h"
 #include "llvm/CodeGen/ValueTypes.h"
 #include "llvm/IR/Attributes.h"
-#include "llvm/IR/CallSite.h"
 #include "llvm/IR/CallingConv.h"
 #include "llvm/IR/DataLayout.h"
 #include "llvm/IR/DerivedTypes.h"
@@ -287,10 +286,6 @@ class TargetLoweringBase {
           IsSwiftSelf(false), IsSwiftError(false), IsCFGuardTarget(false) {}
 
     void setAttributes(const CallBase *Call, unsigned ArgIdx);
-
-    void setAttributes(ImmutableCallSite *CS, unsigned ArgIdx) {
-      return setAttributes(cast<CallBase>(CS->getInstruction()), ArgIdx);
-    }
   };
   using ArgListTy = std::vector<ArgListEntry>;