diff --git a/radio/src/main_arm.cpp b/radio/src/main_arm.cpp
index f13d819c0..09c7b209f 100644
--- a/radio/src/main_arm.cpp
+++ b/radio/src/main_arm.cpp
@@ -39,8 +39,6 @@
 static uint8_t currentSpeakerVolume = 255;
 uint8_t requiredSpeakerVolume = 255;
 
-extern void checkBattery();
-
 void handleUsbConnection()
 {
 #if defined(PCBTARANIS) && !defined(SIMU)
diff --git a/radio/src/opentx.h b/radio/src/opentx.h
index 577aff5a1..b8964aff9 100644
--- a/radio/src/opentx.h
+++ b/radio/src/opentx.h
@@ -1474,6 +1474,10 @@ enum AUDIO_SOUNDS {
 extern uint8_t requiredSpeakerVolume;
 #endif
 
+extern void checkBattery();
+extern void opentxClose();
+extern void opentxInit();
+
 // Re-useable byte array to save having multiple buffers
 #define SD_SCREEN_FILE_LENGTH (32)
 union ReusableBuffer
diff --git a/radio/src/tasks_arm.cpp b/radio/src/tasks_arm.cpp
index 8ca2b437a..a0a0b5c40 100644
--- a/radio/src/tasks_arm.cpp
+++ b/radio/src/tasks_arm.cpp
@@ -155,9 +155,6 @@ void mixerTask(void * pdata)
 
 #define MENU_TASK_PERIOD_TICKS      10    // 20ms
 
-extern void opentxClose();
-extern void opentxInit();
-
 void menusTask(void * pdata)
 {
   opentxInit();