diff --git a/firmware/controllers/trigger/trigger_structure.cpp b/firmware/controllers/trigger/trigger_structure.cpp
index 0ab372372d..c39ccd871f 100644
--- a/firmware/controllers/trigger/trigger_structure.cpp
+++ b/firmware/controllers/trigger/trigger_structure.cpp
@@ -39,10 +39,16 @@ TriggerShape::TriggerShape() :
 	useRiseEdge = false;
 	gapBothDirections = false;
 	isSynchronizationNeeded = false;
+	// todo: reuse 'clear' method?
 	invertOnAdd = false;
 	tdcPosition = 0;
 	skippedToothCount = totalToothCount = 0;
 	syncRatioFrom = syncRatioTo = 0;
+	memset(frontOnlyIndexes, 0, sizeof(frontOnlyIndexes));
+	memset(isFrontEvent, 0, sizeof(isFrontEvent));
+	memset(triggerIndexByAngle, 0, sizeof(triggerIndexByAngle));
+
+
 }
 
 int TriggerShape::getSize() const {