diff --git a/examples/esp32/uart-bridge/main/main.c b/examples/esp32/uart-bridge/main/main.c
index f3073dc9..0f82c1fa 100644
--- a/examples/esp32/uart-bridge/main/main.c
+++ b/examples/esp32/uart-bridge/main/main.c
@@ -5,11 +5,9 @@
 
 const char *s_listening_url = "http://0.0.0.0:80";
 
-#if 0
-char *config_read(void) {
-  return mg_file_read(&mg_fs_posix, FS_ROOT "/config.json", NULL);
+struct mg_str config_read(void) {
+  return mg_file_read(&mg_fs_posix, FS_ROOT "/config.json");
 }
-#endif
 
 void config_write(struct mg_str config) {
   mg_file_write(&mg_fs_posix, FS_ROOT "/config.json", config.ptr, config.len);
diff --git a/examples/uart-bridge/net.c b/examples/uart-bridge/net.c
index c8485603..50d139bf 100644
--- a/examples/uart-bridge/net.c
+++ b/examples/uart-bridge/net.c
@@ -26,6 +26,7 @@ struct state {
 void uart_init(int tx, int rx, int baud);
 int uart_read(void *buf, size_t len);
 void uart_write(const void *buf, size_t len);
+struct mg_str config_read(void);
 void config_write(struct mg_str config);
 
 // Let users define their own UART API. If they don't, use a dummy one
@@ -53,6 +54,10 @@ int uart_read(void *buf, size_t len) {
 #endif
 }
 
+struct mg_str config_read(void) {
+  return mg_file_read(&mg_fs_posix, "config.json");
+}
+
 void config_write(struct mg_str config) {
   mg_file_write(&mg_fs_posix, "config.json", config.ptr, config.len);
 }
@@ -182,7 +187,7 @@ static void config_apply(struct mg_str s) {
 // HTTP request handler function
 void uart_bridge_fn(struct mg_connection *c, int ev, void *ev_data) {
   if (ev == MG_EV_OPEN && c->is_listening) {
-    struct mg_str config = mg_file_read(&mg_fs_posix, "config.json");
+    struct mg_str config = config_read();
     if (config.ptr != NULL) config_apply(config);
     free((char *) config.ptr);
     s_state.tcp.url = strdup(DEFAULT_TCP);