diff --git a/firmware/controllers/engine_cycle/main_trigger_callback.cpp b/firmware/controllers/engine_cycle/main_trigger_callback.cpp
index b176b56f2c..b914945908 100644
--- a/firmware/controllers/engine_cycle/main_trigger_callback.cpp
+++ b/firmware/controllers/engine_cycle/main_trigger_callback.cpp
@@ -63,7 +63,7 @@ void turnInjectionPinLow(InjectionEvent *event) {
 	event->update();
 }
 
-void turnInjectionPinLowStage2(InjectionEvent* event) {
+static void turnInjectionPinLowStage2(InjectionEvent* event) {
 	efitick_t nowNt = getTimeNowNt();
 
 	for (size_t i = 0; i < efi::size(event->outputsStage2); i++) {
diff --git a/firmware/controllers/engine_cycle/main_trigger_callback.h b/firmware/controllers/engine_cycle/main_trigger_callback.h
index de85d01145..a474ad2d64 100644
--- a/firmware/controllers/engine_cycle/main_trigger_callback.h
+++ b/firmware/controllers/engine_cycle/main_trigger_callback.h
@@ -15,4 +15,3 @@ void mainTriggerCallback(uint32_t trgEventIndex, efitick_t edgeTimestamp, angle_
 
 void endSimultaneousInjection(InjectionEvent *event);
 void turnInjectionPinLow(InjectionEvent *event);
-void turnInjectionPinLowStage2(InjectionEvent* event);