diff --git a/app/wizard/tmpl/Makefile_fiber.in b/app/wizard/tmpl/Makefile_fiber.in
index 406fc6470..cf44e0e06 100644
--- a/app/wizard/tmpl/Makefile_fiber.in
+++ b/app/wizard/tmpl/Makefile_fiber.in
@@ -39,7 +39,7 @@ endif
 # For Darwin
 ifeq ($(findstring Darwin, $(UNIXNAME)), Darwin)
 	CFLAGS += -DMACOSX -Wno-invalid-source-encoding \
-		  -Wno-extended-offsetof
+		  -Wno-invalid-offsetof
 	UNIXTYPE = MACOSX
 	SYSLIB +=  -liconv -rdynamic
 	RPATH = macos