diff --git a/sbin/atm/ilmid/ilmid.c b/sbin/atm/ilmid/ilmid.c
index 0d6eeac38471..48089f8bfd1d 100644
--- a/sbin/atm/ilmid/ilmid.c
+++ b/sbin/atm/ilmid/ilmid.c
@@ -1264,7 +1264,7 @@ build_pdu ( hdr, type )
 	    /* Error Index */
 	    *bp++ = ASN_INTEGER;
 	    *bp++ = 0x01;	/* length = 1 */
-	    *bp++ = erridx;	/* index - 0 if no error */
+	    *bp++ = erridx;	/* index == 0 if no error */
 	} else {
 		/* type == PDU_TYPE_TRAP */