diff --git a/firmware/controllers/algo/advance_map.cpp b/firmware/controllers/algo/advance_map.cpp
index 6d1ba40220..2760a431dc 100644
--- a/firmware/controllers/algo/advance_map.cpp
+++ b/firmware/controllers/algo/advance_map.cpp
@@ -250,8 +250,9 @@ size_t getMultiSparkCount(int rpm DECLARE_ENGINE_PARAMETER_SUFFIX) {
 		floatus_t multiDelay = CONFIG(multisparkSparkDuration);
 		floatus_t multiDwell = CONFIG(multisparkDwell);
 
-		ENGINE(engineState.multispark.delay) = US2NT(multiDelay);
-		ENGINE(engineState.multispark.dwell) = US2NT(multiDwell);
+        // dwell times are below 10 seconds here so we use 32 bit type for performance reasons
+		ENGINE(engineState.multispark.delay) = (uint32_t)USF2NT(multiDelay);
+		ENGINE(engineState.multispark.dwell) = (uint32_t)USF2NT(multiDwell);
 
 		constexpr float usPerDegreeAt1Rpm = 60e6 / 360;
 		floatus_t usPerDegree = usPerDegreeAt1Rpm / rpm;