diff --git a/sys/src/9/ip/ip.c b/sys/src/9/ip/ip.c
index ef8a7e19c..32b95b4b6 100644
--- a/sys/src/9/ip/ip.c
+++ b/sys/src/9/ip/ip.c
@@ -402,7 +402,7 @@ ipiput4(Fs *f, Ipifc *ifc, Block *bp)
 		}
 
 		/* reassemble if the interface expects it */
-if(r->ifc == nil) panic("nil route rfc");
+if(r->ifc == nil) panic("nil route ifc");
 		if(r->ifc->reassemble){
 			frag = nhgets(h->frag);
 			if(frag & ~IP_DF) {