diff --git a/radio/src/opentx.cpp b/radio/src/opentx.cpp
index 06f17b0d5..2874c90d8 100644
--- a/radio/src/opentx.cpp
+++ b/radio/src/opentx.cpp
@@ -1811,7 +1811,10 @@ void doMixerCalculations()
             timerState->cnt=0;
           }
           else if (tm == TMRMODE_THR_TRG) {
-            if (val || newTimerVal > 0) {
+            if (val) {
+              timerState->state = TMR_TRIGGED;
+            }
+            if (timerState->state == TMR_TRIGGED) {
               newTimerVal++;
             }
           }
diff --git a/radio/src/opentx.h b/radio/src/opentx.h
index fab5eb6a0..d365a801b 100644
--- a/radio/src/opentx.h
+++ b/radio/src/opentx.h
@@ -860,6 +860,7 @@ extern uint8_t trimsDisplayMask;
 #define TMR_RUNNING  1
 #define TMR_NEGATIVE 2
 #define TMR_STOPPED  3
+#define TMR_TRIGGED  4
 void timerReset(uint8_t idx);
 void flightReset();