diff --git a/cores/esp32/esp32-hal-bt.c b/cores/esp32/esp32-hal-bt.c
index 7b6a54e1ad4..b4c381aa1ab 100644
--- a/cores/esp32/esp32-hal-bt.c
+++ b/cores/esp32/esp32-hal-bt.c
@@ -16,8 +16,12 @@
 
 #ifdef CONFIG_BT_ENABLED
 
+#if CONFIG_IDF_TARGET_ESP32
+bool btInUse(){ return true; }
+#else
 // user may want to change it to free resources
 __attribute__((weak)) bool btInUse(){ return true; }
+#endif
 
 #include "esp_bt.h"
 
diff --git a/cores/esp32/esp32-hal-misc.c b/cores/esp32/esp32-hal-misc.c
index 9bc1b3a3a8e..835cce6f08c 100644
--- a/cores/esp32/esp32-hal-misc.c
+++ b/cores/esp32/esp32-hal-misc.c
@@ -209,9 +209,15 @@ bool verifyRollbackLater() { return false; }
 #endif
 
 #ifdef CONFIG_BT_ENABLED
+#if CONFIG_IDF_TARGET_ESP32
+//overwritten in esp32-hal-bt.c
+bool btInUse() __attribute__((weak));
+bool btInUse(){ return false; }
+#else
 //from esp32-hal-bt.c
 extern bool btInUse();
 #endif
+#endif
 
 void initArduino()
 {
diff --git a/libraries/HTTPUpdateServer/examples/WebUpdater/WebUpdater.ino b/libraries/HTTPUpdateServer/examples/WebUpdater/WebUpdater.ino
index f2503a7efe1..21688c3e7c2 100644
--- a/libraries/HTTPUpdateServer/examples/WebUpdater/WebUpdater.ino
+++ b/libraries/HTTPUpdateServer/examples/WebUpdater/WebUpdater.ino
@@ -33,8 +33,7 @@ void setup(void) {
     Serial.println("WiFi failed, retrying.");
   }
 
-  MDNS.begin(host);
-  if (MDNS.begin("esp32")) {
+  if (MDNS.begin(host)) {
     Serial.println("mDNS responder started");
   }