diff --git a/src/battery/linux.c b/src/battery/linux.c
index 7da833f..22f67f0 100644
--- a/src/battery/linux.c
+++ b/src/battery/linux.c
@@ -285,7 +285,7 @@ static gint estimate_power_usage(struct psy_battery *bat, gint old_energy_now, g
 	gint64 diff_power = ABS(bat->energy_now - old_energy_now);
 	gint64 diff_time = bat->timestamp - old_timestamp;
 
-	/* µW = (µWh * 3600) / (µs * 1000000) */
+	/* µW = (µWh * 3600) / (µs / 1000000) */
 	gint power = diff_power * 3600 * 1000000 / MAX(1, diff_time);
 
 	return power;