diff --git a/firmware/development/engine_sniffer.cpp b/firmware/development/engine_sniffer.cpp
index 8a3329351d..19d1e4775a 100644
--- a/firmware/development/engine_sniffer.cpp
+++ b/firmware/development/engine_sniffer.cpp
@@ -104,7 +104,7 @@ bool WaveChart::isStartedTooLongAgo() const {
 	 * engineChartSize/20 is the longest meaningful chart.
 	 *
 	 */
-	efitick_t chartDurationNt = getTimeNowNt() - startTimeNt;
+	efidur_t chartDurationNt = getTimeNowNt() - startTimeNt;
 	return startTimeNt != 0 && NT2US(chartDurationNt) > engineConfiguration->engineChartSize * 1000000 / 20;
 }