diff --git a/unix/Makefile b/unix/Makefile
index 9a85f59e1c..afe268ae45 100644
--- a/unix/Makefile
+++ b/unix/Makefile
@@ -18,7 +18,7 @@ INC += -I$(PY_SRC)
 INC += -I$(BUILD)
 
 # compiler settings
-CWARN = -Wall -Werror
+CWARN = -Wall -Werror -Wno-error=cpp
 CFLAGS = $(INC) $(CWARN) -ansi -std=gnu99 -DUNIX $(CFLAGS_MOD) $(COPT) $(CFLAGS_EXTRA)
 
 # Debugging/Optimization