diff --git a/drivers/net/wan/x25_asy.c b/drivers/net/wan/x25_asy.c
index 472bd0e6dd9d48a5a22db8ce9efc87968f506fb1..e6e2ce3e7bcf6a1b15d8b9f3cc79ccf1f2ba57f4 100644
--- a/drivers/net/wan/x25_asy.c
+++ b/drivers/net/wan/x25_asy.c
@@ -620,7 +620,7 @@ static struct net_device_stats *x25_asy_get_stats(struct net_device *dev)
   *			STANDARD X.25 ENCAPSULATION		  	 *
   ************************************************************************/
 
-int x25_asy_esc(unsigned char *s, unsigned char *d, int len)
+static int x25_asy_esc(unsigned char *s, unsigned char *d, int len)
 {
 	unsigned char *ptr = d;
 	unsigned char c;