diff --git a/openbsc/src/input/ipaccess.c b/openbsc/src/input/ipaccess.c
index 721cadd..8e18326 100644
--- a/openbsc/src/input/ipaccess.c
+++ b/openbsc/src/input/ipaccess.c
@@ -746,6 +746,9 @@
 	//return e1inp_line_register(line);
 }
 
+extern int make_sock(struct bsc_fd *bfd, int proto, u_int16_t port,
+		     int (*cb)(struct bsc_fd *fd, unsigned int what));
+
 int ipaccess_setup(struct gsm_network *gsmnet)
 {
 	int ret;