diff --git a/fs/squashfs/squashfs.c b/fs/squashfs/squashfs.c
index 4f4a307..cf7431e 100644
--- a/fs/squashfs/squashfs.c
+++ b/fs/squashfs/squashfs.c
@@ -112,7 +112,8 @@
 	return NULL;
 }
 
-void squashfs_set_rootarg(struct squashfs_priv *priv, struct fs_device_d *fsdev)
+static void squashfs_set_rootarg(struct squashfs_priv *priv,
+					struct fs_device_d *fsdev)
 {
 	struct ubi_volume_desc *ubi_vol;
 	struct ubi_volume_info vi = {};