diff --git a/firmware/tunerstudio/rusefi.input b/firmware/tunerstudio/rusefi.input
index b1e15fff1f..769b4991e8 100644
--- a/firmware/tunerstudio/rusefi.input
+++ b/firmware/tunerstudio/rusefi.input
@@ -1933,6 +1933,8 @@ cmd_set_engine_type_default					= "@@TS_IO_TEST_COMMAND_char@@\x00\x31\x00\x00"
 
 	dialog = triggerInputs,					"Trigger Inputs"
 		field = "#Cam is primary if you have cam sensor as part of trigger shape"
+		field = "Cam Sensor (Primary channel)", 		triggerInputPins1, 1, { ambiguousOperationMode == @@operation_mode_e_FOUR_STROKE_CAM_SENSOR@@ }
+		field = "Crank Sensor (Primary channel)", 		triggerInputPins1, 1, { ambiguousOperationMode != @@operation_mode_e_FOUR_STROKE_CAM_SENSOR@@ }
 		field = "Primary channel", 						triggerInputPins1
 		field = "Invert Primary",						invertPrimaryTriggerSignal
 		field = "Secondary channel", 					triggerInputPins2,            { triggerInputPins1 != 0 &&                           trigger_type != @@TT_TT_TOOTHED_WHEEL@@ && trigger_type != @@TT_TT_TOOTHED_WHEEL_60_2@@ && trigger_type != @@TT_TT_TOOTHED_WHEEL_36_1@@ && trigger_type != @@TT_TT_ONE@@ && trigger_type != @@TT_TT_60_2_VW@@ && trigger_type != @@TT_TT_TOOTHED_WHEEL_36_2@@}