diff --git a/firmware/controllers/math/engine_math.cpp b/firmware/controllers/math/engine_math.cpp
index ddb3576a06..87d84cebb4 100644
--- a/firmware/controllers/math/engine_math.cpp
+++ b/firmware/controllers/math/engine_math.cpp
@@ -169,7 +169,7 @@ bool FuelSchedule::addFuelEventsForCylinder(int i  DECLARE_ENGINE_PARAMETER_S) {
 
 	InjectionEvent *ev = &elements[i];
 	ev->ownIndex = i;
-#if EFI_UNIT_TEST
+#if EFI_UNIT_TEST || defined(__DOXYGEN__)
 	ev->engine = engine;
 #endif
 	fixAngle(angle, "addFuel#1");
@@ -182,7 +182,7 @@ bool FuelSchedule::addFuelEventsForCylinder(int i  DECLARE_ENGINE_PARAMETER_S) {
 	efiAssert(TRIGGER_SHAPE(getSize()) > 0, "uninitialized TriggerShape", false);
 
 	TRIGGER_SHAPE(findTriggerPosition(&ev->injectionStart, angle PASS_ENGINE_PARAMETER));
-#if EFI_UNIT_TEST
+#if EFI_UNIT_TEST || defined(__DOXYGEN__)
 	printf("registerInjectionEvent angle=%f trgIndex=%d inj %d\r\n", angle, ev->injectionStart.eventIndex, index);
 #endif
 	return true;