diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index d4714d6cf7d92d495ff4a01b9ffaa47a0651bdfb..53472e27b3277dc0c7bbcc287b7f765885cc5797 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2613,7 +2613,7 @@ static inline void ext4_issue_discard(struct super_block *sb,
 	trace_ext4_discard_blocks(sb,
 			(unsigned long long) discard_block, count);
 	ret = sb_issue_discard(sb, discard_block, count);
-	if (ret == EOPNOTSUPP) {
+	if (ret == -EOPNOTSUPP) {
 		ext4_warning(sb, "discard not supported, disabling");
 		clear_opt(EXT4_SB(sb)->s_mount_opt, DISCARD);
 	}