diff --git a/src/modules/systemlib/battery.h b/src/modules/systemlib/battery.h
index f1bb12e80f..d352030d5d 100644
--- a/src/modules/systemlib/battery.h
+++ b/src/modules/systemlib/battery.h
@@ -92,7 +92,7 @@ public:
 
 private:
 	void filterVoltage(float voltage_v);
-	void filterCurrent(float voltage_a);
+	void filterCurrent(float current_a);
 	void sumDischarged(hrt_abstime timestamp, float current_a);
 	void estimateRemaining(float voltage_v, float throttle_normalized, bool armed);
 	void determineWarning();