diff --git a/Makefile b/Makefile
--- a/Makefile
+++ b/Makefile
@@ -273,7 +273,7 @@ CC_VERSION = $(shell $(CC) -dumpversion 
 # this is a workaround to test for >=
 ifeq ($(shell if test $(CC_VERSION) -ge 29; then echo true; fi), true)
   CFLAGS += -O -Wall -Wno-multichar -Wsign-compare -Wstrict-prototypes
-  CFLAGS += -Wwrite-strings
+  CFLAGS += -Wwrite-strings -Wpointer-arith
 endif
 ifeq ($(shell if test $(CC_VERSION) -ge 30; then echo true; fi), true)
   CFLAGS += -W -Wno-unused-parameter