--- previous/src/slirp/ip_icmp.h	2018/04/24 19:32:36	1.1.1.2
+++ previous/src/slirp/ip_icmp.h	2018/04/24 19:34:25	1.1.1.3
@@ -162,7 +162,7 @@ struct icmp {
 	(type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY)
 
 void icmp_input(struct mbuf *, int);
-void icmp_error(struct mbuf *, u_char, u_char, int, char *);
+void icmp_error(struct mbuf *, u_char, u_char, int, const char *);
 void icmp_reflect(struct mbuf *);
 
 #endif