diff --git a/src/open9x.cpp b/src/open9x.cpp
index a3ec01594..376a4972b 100644
--- a/src/open9x.cpp
+++ b/src/open9x.cpp
@@ -2575,7 +2575,7 @@ void perMain()
       inacCounter++;
       inacPrescale = 0;
       if (inacCounter > ((uint16_t)g_eeGeneral.inactivityTimer*100*60/16))
-        if ((inacCounter&0x3F)==10) AUDIO_INACTIVITY();
+        if ((inacCounter&0x1F)==1) AUDIO_INACTIVITY();
     }
   }