diff --git a/scumm/player_mod.cpp b/scumm/player_mod.cpp
index 7cf07b6d782..c5996828c5a 100644
--- a/scumm/player_mod.cpp
+++ b/scumm/player_mod.cpp
@@ -77,7 +77,7 @@ void Player_MOD::clearUpdateProc() {
 	_mixamt = 0;
 }
 
-void Player_MOD::startChannel (int id, const char *data, int size, int rate, uint8 vol, int loopStart, int loopEnd, int8 pan) {
+void Player_MOD::startChannel (int id, char *data, int size, int rate, uint8 vol, int loopStart, int loopEnd, int8 pan) {
 	int i;
 	if (id == 0)
 		error("player_mod - attempted to start channel id 0");
diff --git a/scumm/player_mod.h b/scumm/player_mod.h
index 4310d16f3ea..f49ccefcbf2 100644
--- a/scumm/player_mod.h
+++ b/scumm/player_mod.h
@@ -36,7 +36,7 @@ public:
 	virtual ~Player_MOD();
 	virtual void setMasterVolume(int vol);
 
-	virtual void startChannel(int id, const char *data, int size, int rate, uint8 vol, int loopStart = 0, int loopEnd = 0, int8 pan = 0);
+	virtual void startChannel(int id, char *data, int size, int rate, uint8 vol, int loopStart = 0, int loopEnd = 0, int8 pan = 0);
 	virtual void stopChannel(int id);
 	virtual void setChannelVol(int id, uint8 vol);
 	virtual void setChannelPan(int id, int8 pan);