diff --git a/sys/kern/kern_ktr.c b/sys/kern/kern_ktr.c
index 6885706e4c0..1af3b94f55d 100644
--- a/sys/kern/kern_ktr.c
+++ b/sys/kern/kern_ktr.c
@@ -419,7 +419,7 @@ DB_SHOW_COMMAND(ktr, db_ktr_all)
 	db_ktr_verbose |= (strchr(modif, 'V') != NULL) ? 1 : 0; /* just timestap please */
 	if (strchr(modif, 'a') != NULL) {
 		db_disable_pager();
-		while (cncheckc() != -1)
+		while (cncheckc() == -1)
 			if (db_mach_vtrace() == 0)
 				break;
 	} else {