diff --git a/sbin/hastd/Makefile b/sbin/hastd/Makefile
index 3c4eef18da4a..d22e389df4bc 100644
--- a/sbin/hastd/Makefile
+++ b/sbin/hastd/Makefile
@@ -27,9 +27,6 @@ CFLAGS+=-DINET
 .if ${MK_INET6_SUPPORT} != "no"
 CFLAGS+=-DINET6
 .endif
-# This is needed to have WARNS > 1.
-CFLAGS+=-DYY_NO_UNPUT
-CFLAGS+=-DYY_NO_INPUT
 
 DPADD=	${LIBGEOM} ${LIBBSDXML} ${LIBSBUF} ${LIBL} ${LIBPTHREAD} ${LIBUTIL}
 LDADD=	-lgeom -lbsdxml -lsbuf -ll -lpthread -lutil
diff --git a/sbin/hastd/token.l b/sbin/hastd/token.l
index 0d1507563eed..35889c2c71fc 100644
--- a/sbin/hastd/token.l
+++ b/sbin/hastd/token.l
@@ -44,6 +44,9 @@ int lineno;
 #define	DP	do { } while (0)
 %}
 
+%option noinput
+%option nounput
+
 %%
 control			{ DP; return CONTROL; }
 pidfile			{ DP; return PIDFILE; }