diff --git a/sbin/quotacheck/quotacheck.8 b/sbin/quotacheck/quotacheck.8
index 41d9fc4b4018..b9bbdad2eafe 100644
--- a/sbin/quotacheck/quotacheck.8
+++ b/sbin/quotacheck/quotacheck.8
@@ -87,7 +87,7 @@ are to be checked.
 .It Fl v
 .Nm quotacheck
 reports discrepancies between the
-calculated and recorded disk quotas.
+calculated and recorded disk quotas and other additional diagnostic messages.
 .El
 .Pp
 Specifying both
diff --git a/sbin/quotacheck/quotacheck.c b/sbin/quotacheck/quotacheck.c
index 465aa881f44c..913e381d9560 100644
--- a/sbin/quotacheck/quotacheck.c
+++ b/sbin/quotacheck/quotacheck.c
@@ -512,8 +512,12 @@ addid(id, type, name)
 		highid[type] = id;
 	if (name)
 		bcopy(name, fup->fu_name, len + 1);
-	else
-		(void)sprintf(fup->fu_name, "%u", id);
+	else {
+		(void)sprintf(fup->fu_name, "%lu", id);
+		if (vflag) 
+			printf("unknown %cid: %lu\n", 
+			    type == USRQUOTA ? 'u' : 'g', id);
+	}
 	return (fup);
 }