diff --git a/desmume/src/NDSSystem.h b/desmume/src/NDSSystem.h
index 829638fac..590025b02 100644
--- a/desmume/src/NDSSystem.h
+++ b/desmume/src/NDSSystem.h
@@ -382,7 +382,6 @@ void nds_savestate(EMUFILE* os);
 bool nds_loadstate(EMUFILE* is, int size);
 
 int NDS_WriteBMP(const char *filename);
-int NDS_CreateDummyFirmware( struct NDS_fw_config_data *user_settings);
 
 void NDS_Sleep();
 void NDS_ToggleCardEject();