diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c
index 02be584..770abab 100644
--- a/net/x25/af_x25.c
+++ b/net/x25/af_x25.c
@@ -678,8 +678,7 @@
 	struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr;
 	int len, i, rc = 0;
 
-	if (!sock_flag(sk, SOCK_ZAPPED) ||
-	    addr_len != sizeof(struct sockaddr_x25) ||
+	if (addr_len != sizeof(struct sockaddr_x25) ||
 	    addr->sx25_family != AF_X25) {
 		rc = -EINVAL;
 		goto out;
@@ -694,9 +693,13 @@
 	}
 
 	lock_sock(sk);
-	x25_sk(sk)->source_addr = addr->sx25_addr;
-	x25_insert_socket(sk);
-	sock_reset_flag(sk, SOCK_ZAPPED);
+	if (sock_flag(sk, SOCK_ZAPPED)) {
+		x25_sk(sk)->source_addr = addr->sx25_addr;
+		x25_insert_socket(sk);
+		sock_reset_flag(sk, SOCK_ZAPPED);
+	} else {
+		rc = -EINVAL;
+	}
 	release_sock(sk);
 	SOCK_DEBUG(sk, "x25_bind: socket is bound\n");
 out: