diff --git a/llvm/cmake/modules/CrossCompile.cmake b/llvm/cmake/modules/CrossCompile.cmake
--- a/llvm/cmake/modules/CrossCompile.cmake
+++ b/llvm/cmake/modules/CrossCompile.cmake
@@ -104,6 +104,10 @@
     set(output_path "${${PROJECT_NAME}_NATIVE_BUILD}/bin/${target}")
   endif()
 
+  if (CMAKE_GENERATOR MATCHES "Visual Studio")
+    set(output_path ${output_path}.exe)
+  endif()
+
   llvm_ExternalProject_BuildCmd(build_cmd ${target} ${${PROJECT_NAME}_NATIVE_BUILD}
                                 CONFIGURATION Release)
   add_custom_command(OUTPUT "${output_path}"