diff --git a/Common.mak b/Common.mak
index 4d3508952..1ae6adfad 100644
--- a/Common.mak
+++ b/Common.mak
@@ -580,7 +580,7 @@ endif
 
 COMMONFLAGS+= -funsigned-char -fno-strict-aliasing $(F_JUMP_TABLES)
 
-COMPILERFLAGS+= $(CWARNS) -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0
+COMPILERFLAGS+= -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0
 
 ifeq (0,$(NETCODE))
     COMPILERFLAGS+= -DNETCODE_DISABLE
@@ -1017,10 +1017,10 @@ ifneq (,$(VC_REV)$(VC_REV_CUSTOM))
     REVFLAG += -DREV="\"r$(VC_REV)$(VC_REV_CUSTOM)\""
 endif
 
-COMPILER_C=$(CC) $(CONLYFLAGS) $(COMMONFLAGS) $(COMPILERFLAGS)
-COMPILER_CXX=$(CXX) $(CXXONLYFLAGS) $(COMMONFLAGS) $(COMPILERFLAGS)
-COMPILER_OBJC=$(COBJC) $(CONLYFLAGS) $(COMMONFLAGS) $(COMPILERFLAGS)
-COMPILER_OBJCXX=$(COBJCXX) $(CXXONLYFLAGS) $(COMMONFLAGS) $(COMPILERFLAGS)
+COMPILER_C=$(CC) $(CONLYFLAGS) $(COMMONFLAGS) $(CWARNS) $(COMPILERFLAGS)
+COMPILER_CXX=$(CXX) $(CXXONLYFLAGS) $(COMMONFLAGS) $(CWARNS) $(COMPILERFLAGS)
+COMPILER_OBJC=$(COBJC) $(CONLYFLAGS) $(COMMONFLAGS) $(CWARNS) $(COMPILERFLAGS)
+COMPILER_OBJCXX=$(COBJCXX) $(CXXONLYFLAGS) $(COMMONFLAGS) $(CWARNS) $(COMPILERFLAGS)
 LINKER=$(L_CXX) $(CXXONLYFLAGS) $(L_CXXONLYFLAGS) $(COMMONFLAGS) $(LINKERFLAGS)
 ifneq ($(CPLUSPLUS),0)
     COMPILER_C=$(COMPILER_CXX)