diff --git a/EKF/RingBuffer.h b/EKF/RingBuffer.h
index 00ab9efaf8..4194f78d4a 100644
--- a/EKF/RingBuffer.h
+++ b/EKF/RingBuffer.h
@@ -188,6 +188,4 @@ private:
 	unsigned _head, _tail, _size;
 	bool _first_write;
 
-	// debug
-	uint64_t _time_last;
 };