diff --git a/firmware/mpeg.c b/firmware/mpeg.c
index 9937c3be47..606b724241 100644
--- a/firmware/mpeg.c
+++ b/firmware/mpeg.c
@@ -37,8 +37,10 @@
 
 extern void bitswap(unsigned char *data, int length);
 
+#ifndef SIMULATOR
 static int get_unplayed_space(void);
 static int get_unswapped_space(void);
+#endif
 
 #define MPEG_PLAY         1
 #define MPEG_STOP         2