diff --git a/net/caif/caif_usb.c b/net/caif/caif_usb.c
index 3ebc8cbc91fff419097799784dad4aa374ced101..ef8ebaa993cf3ca9c915f8d2a230a3d04af79c34 100644
--- a/net/caif/caif_usb.c
+++ b/net/caif/caif_usb.c
@@ -81,8 +81,8 @@ static void cfusbl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl,
 		layr->up->ctrlcmd(layr->up, ctrl, layr->id);
 }
 
-struct cflayer *cfusbl_create(int phyid, u8 ethaddr[ETH_ALEN],
-					u8 braddr[ETH_ALEN])
+static struct cflayer *cfusbl_create(int phyid, u8 ethaddr[ETH_ALEN],
+				      u8 braddr[ETH_ALEN])
 {
 	struct cfusbl *this = kmalloc(sizeof(struct cfusbl), GFP_ATOMIC);