diff --git a/README.md b/README.md
index 036f88fd58..32327d5b6a 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,7 @@ current binaries are always available at http://rusefi.com/build_server/
 
 | Release date  | Revision  | Details |
 | ------------  | --------- | ------- |
+| 05/03/2017    | r13967    | improvement: ChibiOS 3.2 |
 | 04/06/2017    | r13759    | major improvement #72: ChibiOS 3.1 |
 | 03/26/2017    | r13330    | super annoying bug #336 fixed |
 | 03/20/2017    | r13233    | improvements #375 & #376: hard FPU mode & migrating to fresh version of arm gcc |
diff --git a/firmware/controllers/trigger/trigger_structure.cpp b/firmware/controllers/trigger/trigger_structure.cpp
index fc28b49e67..952915ae06 100644
--- a/firmware/controllers/trigger/trigger_structure.cpp
+++ b/firmware/controllers/trigger/trigger_structure.cpp
@@ -53,6 +53,7 @@ void TriggerShape::calculateTriggerSynchPoint(TriggerState *state DECLARE_ENGINE
 	engine->engineCycleEventCount = getLength();
 
 	float firstAngle = getAngle(triggerShapeSynchPointIndex);
+	assertAngleRange(triggerShapeSynchPointIndex, "firstAngle");
 
 	int frontOnlyIndex = 0;
 
@@ -64,6 +65,7 @@ void TriggerShape::calculateTriggerSynchPoint(TriggerState *state DECLARE_ENGINE
 			eventAngles[1] = 0;
 			frontOnlyIndexes[0] = 0;
 		} else {
+			assertAngleRange(triggerShapeSynchPointIndex, "triggerShapeSynchPointIndex");
 			int triggerDefinitionCoordinate = (triggerShapeSynchPointIndex + eventIndex) % engine->engineCycleEventCount;
 			efiAssertVoid(engine->engineCycleEventCount != 0, "zero engineCycleEventCount");
 			int triggerDefinitionIndex = triggerDefinitionCoordinate >= size ? triggerDefinitionCoordinate - size : triggerDefinitionCoordinate;