diff --git a/ip/iptunnel.c b/ip/iptunnel.c
index 43f85855..40186d3d 100644
--- a/ip/iptunnel.c
+++ b/ip/iptunnel.c
@@ -280,7 +280,7 @@ static int do_add(int cmd, int argc, char **argv)
 		return -1;
 
 	if (p.iph.ttl && p.iph.frag_off == 0) {
-		fprintf(stderr, "ttl != 0 and noptmudisc are incompatible\n");
+		fprintf(stderr, "ttl != 0 and nopmtudisc are incompatible\n");
 		return -1;
 	}
 
diff --git a/ip/link_iptnl.c b/ip/link_iptnl.c
index 394254d8..d5324f8e 100644
--- a/ip/link_iptnl.c
+++ b/ip/link_iptnl.c
@@ -233,7 +233,7 @@ get_failed:
 	}
 
 	if (ttl && pmtudisc == 0) {
-		fprintf(stderr, "ttl != 0 and noptmudisc are incompatible\n");
+		fprintf(stderr, "ttl != 0 and nopmtudisc are incompatible\n");
 		exit(-1);
 	}