diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c
index 3110217..5b5880c 100644
--- a/drivers/usb/host/ohci-at91.c
+++ b/drivers/usb/host/ohci-at91.c
@@ -138,7 +138,7 @@
 
 static void usb_hcd_at91_remove (struct usb_hcd *, struct platform_device *);
 
-struct regmap *at91_dt_syscon_sfr(void)
+static struct regmap *at91_dt_syscon_sfr(void)
 {
 	struct regmap *regmap;