diff --git a/src/Util.h b/src/Util.h
index 2c19f034..424bd5ae 100644
--- a/src/Util.h
+++ b/src/Util.h
@@ -28,18 +28,6 @@ uint8_t *utilLoad(const char *, bool (*)(const char*), uint8_t *, int &);
 
 void utilPutDword(uint8_t *, uint32_t);
 void utilPutWord(uint8_t *, uint16_t);
-void utilWriteData(gzFile, variable_desc *);
-void utilReadData(gzFile, variable_desc *);
-void utilReadDataSkip(gzFile, variable_desc *);
-int utilReadInt(gzFile);
-void utilWriteInt(gzFile, int);
-gzFile utilGzOpen(const char *file, const char *mode);
-gzFile utilMemGzOpen(char *memory, int available, const char *mode);
-int utilGzWrite(gzFile file, const voidp buffer, unsigned int len);
-int utilGzRead(gzFile file, voidp buffer, unsigned int len);
-int utilGzClose(gzFile file);
-z_off_t utilGzSeek(gzFile file, z_off_t offset, int whence);
-long utilGzMemTell(gzFile file);
 void utilGBAFindSave(const int);
 void utilUpdateSystemColorMaps(bool lcd = false);
 bool utilFileExists( const char *filename );
@@ -57,7 +45,7 @@ void utilReadDataMem(const uint8_t *& data, variable_desc *);
 gzFile utilGzOpen(const char *file, const char *mode);
 gzFile utilMemGzOpen(char *memory, int available, const char *mode);
 int utilGzWrite(gzFile file, const voidp buffer, unsigned int len);
-int utilGzRead(gzFile file, voidp buffer, unsigned int len);
+int utilGzRead(gzFile file, void buffer, unsigned int len);
 int utilGzClose(gzFile file);
 z_off_t utilGzSeek(gzFile file, z_off_t offset, int whence);
 long utilGzMemTell(gzFile file);