diff --git a/mongoose.h b/mongoose.h
index 8628ac24..9a1c4baa 100644
--- a/mongoose.h
+++ b/mongoose.h
@@ -211,11 +211,14 @@ static inline void *mg_calloc(size_t cnt, size_t size) {
   return p;
 }
 
+#if MG_ENABLE_POSIX_FS
+#else
 #define mkdir(a, b) mg_mkdir(a, b)
 static inline int mg_mkdir(const char *path, mode_t mode) {
   (void) path, (void) mode;
   return -1;
 }
+#endif
 
 #endif  // MG_ARCH == MG_ARCH_FREERTOS
 
diff --git a/src/arch_freertos.h b/src/arch_freertos.h
index a55f59db..cbf7ba9b 100644
--- a/src/arch_freertos.h
+++ b/src/arch_freertos.h
@@ -37,10 +37,13 @@ static inline void *mg_calloc(size_t cnt, size_t size) {
   return p;
 }
 
+#if MG_ENABLE_POSIX_FS
+#else
 #define mkdir(a, b) mg_mkdir(a, b)
 static inline int mg_mkdir(const char *path, mode_t mode) {
   (void) path, (void) mode;
   return -1;
 }
+#endif
 
 #endif  // MG_ARCH == MG_ARCH_FREERTOS
diff --git a/tutorials/http/device-dashboard/net.c b/tutorials/http/device-dashboard/net.c
index d47daae7..baed248e 100644
--- a/tutorials/http/device-dashboard/net.c
+++ b/tutorials/http/device-dashboard/net.c
@@ -254,6 +254,6 @@ void web_init(struct mg_mgr *mgr) {
   s_settings.device_name = strdup("My Device");
   mg_http_listen(mgr, HTTP_URL, fn, NULL);
   mg_http_listen(mgr, HTTPS_URL, fn, NULL);
-  mg_timer_add(mgr, 3600 * 1000, MG_TIMER_RUN_NOW | MG_TIMER_REPEAT,
+  mg_timer_add(mgr, 10 * 1000, MG_TIMER_RUN_NOW | MG_TIMER_REPEAT,
                timer_sntp_fn, mgr);
 }
diff --git a/tutorials/tcpip/tap-driver/main.c b/tutorials/tcpip/tap-driver/main.c
index 008ae9a3..72fb58db 100644
--- a/tutorials/tcpip/tap-driver/main.c
+++ b/tutorials/tcpip/tap-driver/main.c
@@ -112,7 +112,7 @@ int main(int argc, char *argv[]) {
   struct mg_tcpip_driver driver = {.tx = tap_tx, .poll = tap_poll, .rx = tap_rx};
   struct mg_tcpip_if mif = {.driver = &driver,
                             .driver_data = &fd,
-                            .enable_req_dns = true,
+                            .enable_req_dns = false,
                             .enable_req_sntp = true,
                             .fn = mif_fn};
   sscanf(mac, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", &mif.mac[0], &mif.mac[1],