diff --git a/firmware/hw_layer/microsecond_timer.c b/firmware/hw_layer/microsecond_timer.c
index c51e3bdc65..0d45fa8cdd 100644
--- a/firmware/hw_layer/microsecond_timer.c
+++ b/firmware/hw_layer/microsecond_timer.c
@@ -38,7 +38,7 @@ schfunc_t globalTimerCallback;
 void setHardwareUsTimer(int32_t timeUs) {
 	if (timeUs == 1)
 		timeUs = 2; // for some reason '1' does not really work
-	efiAssertVoid(timeUs > 0, "neg timeUs");
+	efiAssertVoid(timeUs > 0, "not positive timeUs");
 	efiAssertVoid(timeUs < 10 * US_PER_SECOND, "setHardwareUsTimer() too large");
 
 	if (GPTDEVICE.state == GPT_ONESHOT)