Index: lib/Headers/__clang_cuda_runtime_wrapper.h
===================================================================
--- lib/Headers/__clang_cuda_runtime_wrapper.h
+++ lib/Headers/__clang_cuda_runtime_wrapper.h
@@ -199,7 +199,6 @@
 // Set up compiler macros expected to be seen during compilation.
 #undef __CUDABE__
 #define __CUDACC__
-#define __NVCC__
 
 #if defined(__CUDA_ARCH__)
 // We need to emit IR declaration for non-existing __nvvm_reflect() to