diff --git a/lib/socket.h b/lib/socket.h
index 31009ecb..54d87384 100644
--- a/lib/socket.h
+++ b/lib/socket.h
@@ -88,6 +88,7 @@ sock *sock_new(pool *);			/* Allocate new socket */
 #define sk_new(X) sock_new(X)		/* Wrapper to avoid name collision with OpenSSL */
 
 int sk_open(sock *, struct birdloop *);		/* Open socket */
+int sk_open_unix(struct birdsock *s, struct birdloop *, const char *name);  /* Open UNIX socket */
 void sk_reloop(sock *, struct birdloop *);	/* Move socket to another loop. Both loops must be locked. */
 static inline void sk_close(sock *s) { rfree(&s->r); }	/* Explicitly close socket */
 
diff --git a/sysdep/unix/socket.c b/sysdep/unix/socket.c
index 890014be..0154f10b 100644
--- a/sysdep/unix/socket.c
+++ b/sysdep/unix/socket.c
@@ -1379,7 +1379,7 @@ err:
 }
 
 int
-sk_open_unix(sock *s, struct birdloop *loop, char *name)
+sk_open_unix(sock *s, struct birdloop *loop, const char *name)
 {
   struct sockaddr_un sa;
   int fd;
diff --git a/sysdep/unix/unix.h b/sysdep/unix/unix.h
index 71bc7a6c..eb8e4b2c 100644
--- a/sysdep/unix/unix.h
+++ b/sysdep/unix/unix.h
@@ -113,7 +113,6 @@ extern volatile sig_atomic_t async_shutdown_flag;
 void io_init(void);
 void io_loop(void);
 void io_log_dump(void);
-int sk_open_unix(struct birdsock *s, struct birdloop *, char *name);
 
 enum rf_mode {
   RF_APPEND = 1,