diff --git a/radio/src/pulses/multi_arm.cpp b/radio/src/pulses/multi_arm.cpp
index 9dee80bc0..0d00abd10 100644
--- a/radio/src/pulses/multi_arm.cpp
+++ b/radio/src/pulses/multi_arm.cpp
@@ -61,7 +61,7 @@ static void _send_level(uint8_t v)
   else
     v -= 2;
 
-  *modulePulsesData[EXTERNAL_MODULE].dsm2.ptr++ = v;
+  *modulePulsesData[EXTERNAL_MODULE].dsm2.ptr++ = v - 1;
   modulePulsesData[EXTERNAL_MODULE].dsm2.index+=1;
   modulePulsesData[EXTERNAL_MODULE].dsm2.rest -=v;
 }