diff --git a/radio/src/timers.cpp b/radio/src/timers.cpp
index 6f8e34e83..9f6e3611d 100644
--- a/radio/src/timers.cpp
+++ b/radio/src/timers.cpp
@@ -78,7 +78,7 @@ void saveTimers()
 void evalTimers(int16_t throttle, uint8_t tick10ms)
 {
   for (uint8_t i=0; i<TIMERS; i++) {
-    int8_t timerMode = g_model.timers[i].mode;
+    tmrmode_t timerMode = g_model.timers[i].mode;
     tmrstart_t timerStart = g_model.timers[i].start;
     TimerState * timerState = &timersStates[i];
 
diff --git a/radio/src/timers.h b/radio/src/timers.h
index 1090b0623..6e04102a2 100644
--- a/radio/src/timers.h
+++ b/radio/src/timers.h
@@ -29,10 +29,12 @@
 #if defined(CPUARM)
 typedef int32_t tmrval_t;
 typedef uint32_t tmrstart_t;
+typedef int16_t tmrmode_t;
 #define TIMER_MAX     (0xffffff/2)
 #else
 typedef int16_t tmrval_t;
 typedef uint16_t tmrstart_t;
+typedef int8_t tmrmode_t;
 #define TIMER_MAX     (0xffff/2)
 #endif