diff --git a/src/constraint-disabled.c b/src/constraint-disabled.c
index 6b31d0b..71fc59c 100644
--- a/src/constraint-disabled.c
+++ b/src/constraint-disabled.c
@@ -66,6 +66,11 @@ constraint_add(struct constraint *cstr)
 	free(cstr);
 }
 
+void
+constraint_reset(void)
+{
+}
+
 void
 constraint_msg_dns(u_int32_t id, u_int8_t *data, size_t len)
 {