diff --git a/firmware/controllers/trigger/decoders/trigger_structure.h b/firmware/controllers/trigger/decoders/trigger_structure.h
index 75cdd46f78..d1d4a687c6 100644
--- a/firmware/controllers/trigger/decoders/trigger_structure.h
+++ b/firmware/controllers/trigger/decoders/trigger_structure.h
@@ -83,6 +83,9 @@ public:
 	 */
 	bool isSynchronizationNeeded;
 
+	/**
+	 * trigger meta information: is second wheel mounted on crank shaft ('false') or cam shaft ('true')
+	 */
 	bool isSecondWheelCam;
 	/**
 	 * number of consecutive trigger gaps needed to synchronize