diff --git a/scst/src/dev_handlers/scst_vdisk.c b/scst/src/dev_handlers/scst_vdisk.c
index c9485c9b4..6d2171274 100644
--- a/scst/src/dev_handlers/scst_vdisk.c
+++ b/scst/src/dev_handlers/scst_vdisk.c
@@ -3261,7 +3261,7 @@ static enum compl_status_e fileio_exec_async(struct vdisk_cmd_params *p)
 		length = scst_get_buf_next(cmd, &address);
 	}
 
-	WARN_ON_ONCE(sg_cnt != scst_get_buf_count(cmd));
+	WARN_ON_ONCE(sg_cnt != cmd->sg_cnt);
 
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 20, 0)
 	iov_iter_kvec(&iter, dir, p->async.kvec, sg_cnt, total);