diff --git a/firmware/util/timer.cpp b/firmware/util/timer.cpp
index 5104fa0318..500586e778 100644
--- a/firmware/util/timer.cpp
+++ b/firmware/util/timer.cpp
@@ -35,7 +35,7 @@ float Timer::getElapsedSeconds() const {
 }
 
 float Timer::getElapsedSeconds(efitick_t nowNt) const {
-	return 1e-6 * getElapsedUs(nowNt);
+	return 1 / US_PER_SECOND_F * getElapsedUs(nowNt);
 }
 
 float Timer::getElapsedUs(efitick_t nowNt) const {