diff --git a/src/Limelight-internal.h b/src/Limelight-internal.h
index 0427fe9..2914408 100644
--- a/src/Limelight-internal.h
+++ b/src/Limelight-internal.h
@@ -113,7 +113,7 @@ void connectionSawFrame(int frameIndex);
 void connectionLostPackets(int lastReceivedPacket, int nextReceivedPacket);
 void connectionSendFrameFecStatus(PSS_FRAME_FEC_STATUS fecStatus);
 int sendInputPacketOnControlStream(unsigned char* data, int length, uint8_t channelId, uint32_t flags, bool moreData);
-void flushInputOnControlStream();
+void flushInputOnControlStream(void);
 bool isControlDataInTransit(void);
 
 int performRtspHandshake(PSERVER_INFORMATION serverInfo);