diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 1345c4e84cc3..474aebfdc1dd 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -6280,8 +6280,8 @@ static void ext4_mb_clear_bb(handle_t *handle, struct inode *inode,
 		 * them with group lock_held
 		 */
 		if (test_opt(sb, DISCARD)) {
-			err = ext4_issue_discard(sb, block_group, bit, count,
-						 NULL);
+			err = ext4_issue_discard(sb, block_group, bit,
+						 count_clusters, NULL);
 			if (err && err != -EOPNOTSUPP)
 				ext4_msg(sb, KERN_WARNING, "discard request in"
 					 " group:%u block:%d count:%lu failed"