diff --git a/radio/src/gui/128x64/model_setup.cpp b/radio/src/gui/128x64/model_setup.cpp
index b28833283..73393b72f 100644
--- a/radio/src/gui/128x64/model_setup.cpp
+++ b/radio/src/gui/128x64/model_setup.cpp
@@ -410,10 +410,12 @@ void menuModelSetup(event_t event)
           switch (menuHorizontalPosition) {
             case 0:
             {
-              int8_t timerMode = timer->mode;
-              if (timerMode < 0) timerMode -= TMRMODE_COUNT-1;
+              swsrc_t timerMode = timer->mode;
+              if (timerMode < 0)
+                timerMode -= TMRMODE_COUNT-1;
               CHECK_INCDEC_MODELVAR_CHECK(event, timerMode, -TMRMODE_COUNT-SWSRC_LAST+1, TMRMODE_COUNT+SWSRC_LAST-1, isSwitchAvailableInTimers);
-              if (timerMode < 0) timerMode += TMRMODE_COUNT-1;
+              if (timerMode < 0)
+                timerMode += TMRMODE_COUNT-1;
               timer->mode = timerMode;
 #if defined(AUTOSWITCH)
               if (s_editMode>0) {