diff --git a/llvm/lib/IR/RuntimeLibcalls.cpp b/llvm/lib/IR/RuntimeLibcalls.cpp
index 2cbc2cdb79685..45b778d61d8e0 100644
--- a/llvm/lib/IR/RuntimeLibcalls.cpp
+++ b/llvm/lib/IR/RuntimeLibcalls.cpp
@@ -365,12 +365,6 @@ void RuntimeLibcallsInfo::initLibcalls(const Triple &TT,
     if (darwinHasSinCosStret(TT)) {
       setLibcallImpl(RTLIB::SINCOS_STRET_F32, RTLIB::__sincosf_stret);
       setLibcallImpl(RTLIB::SINCOS_STRET_F64, RTLIB::__sincos_stret);
-      if (TT.isWatchABI()) {
-        setLibcallImplCallingConv(RTLIB::__sincosf_stret,
-                                  CallingConv::ARM_AAPCS_VFP);
-        setLibcallImplCallingConv(RTLIB::__sincos_stret,
-                                  CallingConv::ARM_AAPCS_VFP);
-      }
     }
 
     if (darwinHasExp10(TT)) {