diff --git a/Makefile b/Makefile
index 9c8d51a..0ed61bd 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 CC = cc
-CFLAGS = -Wall -O2
+CFLAGS = -Wall -O2 -Wno-format-security
 LDFLAGS =
 OBJS = eqn.o tok.o src.o def.o box.o reg.o sbuf.o