diff --git a/BaseTools/Source/C/Makefiles/header.makefile b/BaseTools/Source/C/Makefiles/header.makefile
index 08421ba24c..498c6cf48b 100644
--- a/BaseTools/Source/C/Makefiles/header.makefile
+++ b/BaseTools/Source/C/Makefiles/header.makefile
@@ -68,7 +68,8 @@ $(error Bad HOST_ARCH)
 endif
 
 INCLUDE = $(TOOL_INCLUDE) -I $(MAKEROOT) -I $(MAKEROOT)/Include/Common -I $(MAKEROOT)/Include/ -I $(MAKEROOT)/Include/IndustryStandard -I $(MAKEROOT)/Common/ -I .. -I . $(ARCH_INCLUDE) 
-BUILD_CPPFLAGS = $(INCLUDE) -O2
+BUILD_CPPFLAGS = $(INCLUDE)
+BUILD_OPTFLAGS = -O2
 ifeq ($(DARWIN),Darwin)
 # assume clang or clang compatible flags on OS X
 BUILD_CFLAGS = -MD -fshort-wchar -fno-strict-aliasing -Wall -Werror -Wno-deprecated-declarations -Wno-self-assign -Wno-unused-result -nostdlib -g
@@ -91,6 +92,9 @@ ifeq ($(DARWIN),Darwin)
 endif
 endif
 
+# keep BUILD_OPTFLAGS last
+BUILD_CFLAGS   += $(BUILD_OPTFLAGS)
+BUILD_CXXFLAGS += $(BUILD_OPTFLAGS)
   
 .PHONY: all
 .PHONY: install
diff --git a/BaseTools/Source/C/VfrCompile/GNUmakefile b/BaseTools/Source/C/VfrCompile/GNUmakefile
index c4ec61aa6c..bbe562cbc5 100644
--- a/BaseTools/Source/C/VfrCompile/GNUmakefile
+++ b/BaseTools/Source/C/VfrCompile/GNUmakefile
@@ -25,6 +25,9 @@ OBJECTS = AParser.o DLexerBase.o ATokenBuffer.o EfiVfrParser.o VfrLexer.o VfrSyn
 
 VFR_CPPFLAGS = -DPCCTS_USE_NAMESPACE_STD $(BUILD_CPPFLAGS)
 
+# keep BUILD_OPTFLAGS last
+VFR_CXXFLAGS = $(BUILD_OPTFLAGS)
+
 LINKER = $(BUILD_CXX)
 
 EXTRA_CLEAN_OBJECTS = EfiVfrParser.cpp EfiVfrParser.h VfrParser.dlg VfrTokens.h VfrLexer.cpp VfrLexer.h VfrSyntax.cpp tokens.h
@@ -58,16 +61,16 @@ Pccts/dlg/dlg:
 	BIN_DIR='.' $(MAKE) -C Pccts/dlg
 
 ATokenBuffer.o: Pccts/h/ATokenBuffer.cpp
-	$(BUILD_CXX) -c $(VFR_CPPFLAGS) $(INC) $? -o $@
+	$(BUILD_CXX) -c $(VFR_CPPFLAGS) $(INC) $(VFR_CXXFLAGS) $? -o $@
 
 DLexerBase.o: Pccts/h/DLexerBase.cpp
-	$(BUILD_CXX) -c $(VFR_CPPFLAGS) $(INC) $? -o $@
+	$(BUILD_CXX) -c $(VFR_CPPFLAGS) $(INC) $(VFR_CXXFLAGS) $? -o $@
 
 AParser.o: Pccts/h/AParser.cpp
-	$(BUILD_CXX) -c $(VFR_CPPFLAGS) $(INC) $? -o $@
+	$(BUILD_CXX) -c $(VFR_CPPFLAGS) $(INC) $(VFR_CXXFLAGS) $? -o $@
 
 VfrSyntax.o: VfrSyntax.cpp
-	$(BUILD_CXX) -c $(VFR_CPPFLAGS) $(INC) $? -o $@
+	$(BUILD_CXX) -c $(VFR_CPPFLAGS) $(INC) $(VFR_CXXFLAGS) $? -o $@
 	
 clean: localClean