diff --git a/module/zfs/zvol.c b/module/zfs/zvol.c
index cb5ee483c1c1..31b3b91d6526 100644
--- a/module/zfs/zvol.c
+++ b/module/zfs/zvol.c
@@ -1311,13 +1311,12 @@ static void
 zvol_rename_minors_impl(const char *oldname, const char *newname)
 {
 	zvol_state_t *zv, *zv_next;
-	int oldnamelen, newnamelen;
+	int oldnamelen;
 
 	if (zvol_inhibit_dev)
 		return;
 
 	oldnamelen = strlen(oldname);
-	newnamelen = strlen(newname);
 
 	rw_enter(&zvol_state_lock, RW_READER);