diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 6984f6c10a86..04fca06bd520 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -566,6 +566,7 @@ static void process_inode_switch_wbs(struct bdi_writeback *new_wb,
 		}
 	}
 
+	wb_io_lists_depopulated(old_wb);
 	spin_unlock(&new_wb->list_lock);
 	spin_unlock(&old_wb->list_lock);