diff --git a/src/libslirp.h b/src/libslirp.h
index f75afa4..7492b3c 100644
--- a/src/libslirp.h
+++ b/src/libslirp.h
@@ -114,12 +114,12 @@
     * otherwise. */
     bool (*try_connect)(const struct sockaddr_storage *addr,
                         SlirpProxyConnectFunc *connect_func,
-                        void *connect_opaque);
+                        void *connect_opaque, void *opaque);
 
     /* Remove a proxy connection that was previously started with
     * a call to try_connect(). |connect_opaque| should be the same parameter
     * as the one passed to the function. */
-    void (*remove)(void *connect_opaque);
+    void (*remove)(void *connect_opaque, void *opaque);
 
 } SlirpCb;
 
diff --git a/src/socket.c b/src/socket.c
index b578f57..2497615 100644
--- a/src/socket.c
+++ b/src/socket.c
@@ -86,7 +86,7 @@
 
     if (so->so_state) {
         if (slirp->http_proxy_on && slirp->cb->remove)
-            slirp->cb->remove(so);
+            slirp->cb->remove(so, slirp->opaque);
     }
     if (so->s_aux != -1) {
         closesocket(so->s_aux);
diff --git a/src/tcp_subr.c b/src/tcp_subr.c
index 9781f92..4ae3a3f 100644
--- a/src/tcp_subr.c
+++ b/src/tcp_subr.c
@@ -429,7 +429,7 @@
     Slirp *slirp = so->slirp;
 
     if (slirp->http_proxy_on && slirp->cb->try_connect &&
-        slirp->cb->try_connect(&addr, tcp_on_proxy_connection, so)) {
+        slirp->cb->try_connect(&addr, tcp_on_proxy_connection, so, slirp->opaque)) {
         soisfconnecting(so);
         so->s = -1;
         so->so_state |= SS_PROXIFIED;