diff --git a/src/open9x.cpp b/src/open9x.cpp
index 4055bb1d2..da309ccb6 100644
--- a/src/open9x.cpp
+++ b/src/open9x.cpp
@@ -2381,8 +2381,10 @@ inline void doMixerCalculations(tmr10ms_t tmr10ms, uint8_t tick10ms)
       val = -val + calc100toRESX(g_model.limitData[ch].max + 100);
     else
       val = val - calc100toRESX(g_model.limitData[ch].min - 100);
+#if defined(PPM_LIMITS_SYMETRICAL)
     if (g_model.limitData[ch].symetrical)
       val -= calc1000toRESX(g_model.limitData[ch].offset);
+#endif      
     val = val * 10 / (10+(g_model.limitData[ch].max-g_model.limitData[ch].min)/20);
     val -= RESX;
   }