diff --git a/Common.mak b/Common.mak
index 23aa932f0..a1dd563b3 100644
--- a/Common.mak
+++ b/Common.mak
@@ -287,6 +287,11 @@ CSTD:=-std=gnu99
 CONLYFLAGS=$(CSTD)
 CXXSTD:=-std=gnu++03
 CXXONLYFLAGS=$(CXXSTD) -fno-exceptions -fno-rtti
+ifneq (0,$(CLANG))
+    CSTD:=$(subst gnu,c,$(CSTD))
+    CXXSTD:=$(subst gnu,c,$(CXXSTD))
+endif
+
 ASFORMAT=elf$(BITS)
 ASFLAGS=-s -f $(ASFORMAT) #-g
 LINKERFLAGS=