diff --git a/lldb/packages/Python/lldbsuite/test/make/Makefile.rules b/lldb/packages/Python/lldbsuite/test/make/Makefile.rules
index 3726826d4fd1..910dc6737c71 100644
--- a/lldb/packages/Python/lldbsuite/test/make/Makefile.rules
+++ b/lldb/packages/Python/lldbsuite/test/make/Makefile.rules
@@ -303,6 +303,7 @@ ifeq "$(OS)" "Windows_NT"
 		CXXFLAGS += -D_HAS_EXCEPTIONS=0
 		ifeq "$(VisualStudioVersion)" "14.0"
 			CXXFLAGS += -fms-compatibility-version=19.0
+			override CXXFLAGS := $(subst -std=c++11,-std=c++14,$(CXXFLAGS))
 		endif
 		# The MSVC linker doesn't understand long section names
 		# generated by the clang compiler.