diff --git a/Makefile.flags b/Makefile.flags
index c43c8dc..f5f4465 100644
--- a/Makefile.flags
+++ b/Makefile.flags
@@ -25,6 +25,7 @@
 CFLAGS += $(call cc-option,-Wunused -Wunused-parameter,)
 CFLAGS += $(call cc-option,-Wunused-function -Wunused-value,)
 CFLAGS += $(call cc-option,-Wmissing-prototypes -Wmissing-declarations,)
+CFLAGS += $(call cc-option,-Wno-format-security,)
 # warn about C99 declaration after statement
 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 # If you want to add more -Wsomething above, make sure that it is