diff --git a/include/haproxy/connection.h b/include/haproxy/connection.h
index bfa658768..5ce13899a 100644
--- a/include/haproxy/connection.h
+++ b/include/haproxy/connection.h
@@ -101,6 +101,7 @@ uint64_t conn_hash_digest(char *buf, size_t bufsize,
                           enum conn_hash_params_t flags);
 const char *conn_err_code_str(struct connection *c);
 int xprt_add_hs(struct connection *conn);
+void register_mux_proto(struct mux_proto_list *list);
 
 extern struct idle_conns idle_conns[MAX_THREADS];
 
@@ -518,12 +519,6 @@ static inline int conn_get_alpn(const struct connection *conn, const char **str,
 	return conn->xprt->get_alpn(conn, conn->xprt_ctx, str, len);
 }
 
-/* registers proto mux list <list>. Modifies the list element! */
-static inline void register_mux_proto(struct mux_proto_list *list)
-{
-	LIST_APPEND(&mux_proto_list.list, &list->list);
-}
-
 /* unregisters proto mux list <list> */
 static inline void unregister_mux_proto(struct mux_proto_list *list)
 {
diff --git a/src/connection.c b/src/connection.c
index c156d9313..7d41471e5 100644
--- a/src/connection.c
+++ b/src/connection.c
@@ -1565,6 +1565,12 @@ int conn_recv_socks4_proxy_response(struct connection *conn)
 	return 0;
 }
 
+/* registers proto mux list <list>. Modifies the list element! */
+void register_mux_proto(struct mux_proto_list *list)
+{
+	LIST_APPEND(&mux_proto_list.list, &list->list);
+}
+
 /* Lists the known proto mux on <out>. This function is used by "haproxy -vv"
  * and is suitable for early boot just after the "REGISTER" stage because it
  * doesn't depend on anything to be already allocated.