diff --git a/include/net/esp.h b/include/net/esp.h
index d58451331dbde8a0d9b4231a61bd4957f62cdeec..1356dda00d22f9cd3fad3ea0eb625b667f76c017 100644
--- a/include/net/esp.h
+++ b/include/net/esp.h
@@ -13,7 +13,7 @@ struct esp_data {
 	struct crypto_aead *aead;
 };
 
-extern void *pskb_put(struct sk_buff *skb, struct sk_buff *tail, int len);
+void *pskb_put(struct sk_buff *skb, struct sk_buff *tail, int len);
 
 struct ip_esp_hdr;