diff --git a/sys/net/if.c b/sys/net/if.c
--- a/sys/net/if.c
+++ b/sys/net/if.c
@@ -4622,9 +4622,9 @@
 }
 
 int
-if_init(if_t ifp)
+if_init(if_t ifp, void *ctx)
 {
-	(*((struct ifnet *)ifp)->if_init)((struct ifnet *)ifp);
+	(*((struct ifnet *)ifp)->if_init)(ctx);
 	return (0);
 }
 
diff --git a/sys/net/if_var.h b/sys/net/if_var.h
--- a/sys/net/if_var.h
+++ b/sys/net/if_var.h
@@ -784,7 +784,7 @@
 void if_etherbpfmtap(if_t ifp, struct mbuf *m);
 void if_vlancap(if_t ifp);
 int if_transmit(if_t ifp, struct mbuf *m);
-int if_init(if_t ifp);
+int if_init(if_t ifp, void *ctx);
 
 /*
  * Traversing through interface address lists.