diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index 0e6fa91f4c8f..55daf740ab8d 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -171,7 +171,10 @@ static int gfs2_check_sb(struct gfs2_sbd *sdp, int silent)
 		pr_warn("Invalid superblock size\n");
 		return -EINVAL;
 	}
-
+	if (sb->sb_bsize_shift != ffs(sb->sb_bsize) - 1) {
+		pr_warn("Invalid block size shift\n");
+		return -EINVAL;
+	}
 	return 0;
 }