diff --git a/headers/private/interface/PicturePlayer.h b/headers/private/interface/PicturePlayer.h
index acff192abe..2da9ce3b57 100644
--- a/headers/private/interface/PicturePlayer.h
+++ b/headers/private/interface/PicturePlayer.h
@@ -22,7 +22,7 @@
 class PicturePlayer {
 public:
 					PicturePlayer();
-					PicturePlayer(void *data, int32 size, BList *pictures);
+					PicturePlayer(const void *data, int32 size, BList *pictures);
 virtual				~PicturePlayer();
 
 		int16		GetOp();