diff --git a/Makefile b/Makefile
index 697c18a259de564ceb7d6513173885842b3aae76..fe6211d2609832345d115fed665a34ef3f4540bd 100644
--- a/Makefile
+++ b/Makefile
@@ -193,7 +193,7 @@ ASTCFLAGS+=-pipe -Wall -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declar
 ASTCFLAGS+=-include $(ASTTOPDIR)/include/asterisk/autoconfig.h
 
 ifeq ($(AST_DEVMODE),yes)
-  ASTCFLAGS+=-Werror -Wunused -Wundef $(AST_DECLARATION_AFTER_STATEMENT) -DAST_DEVMODE
+  ASTCFLAGS+=-Werror -Wunused -Wundef $(AST_DECLARATION_AFTER_STATEMENT)
 endif
 
 ifneq ($(findstring BSD,$(OSARCH)),)