diff --git a/radio/src/audio_arm.cpp b/radio/src/audio_arm.cpp
index c9ebe286c..ef0af541e 100644
--- a/radio/src/audio_arm.cpp
+++ b/radio/src/audio_arm.cpp
@@ -20,7 +20,6 @@
 
 #include "opentx.h"
 #include <math.h>
-#include <strings.h>
  
 extern OS_MutexID audioMutex;