diff --git a/include/ide.h b/include/ide.h
index e29ed36..6976a6c 100644
--- a/include/ide.h
+++ b/include/ide.h
@@ -49,7 +49,7 @@
  */
 
 void ide_init(void);
-ulong ide_read(int device, lbaint_t blknr, ulong blkcnt, ulong *buffer);
-ulong ide_write(int device, lbaint_t blknr, ulong blkcnt, ulong *buffer);
+ulong ide_read(int device, lbaint_t blknr, ulong blkcnt, void *buffer);
+ulong ide_write(int device, lbaint_t blknr, ulong blkcnt, void *buffer);
 
 #endif /* _IDE_H */
diff --git a/include/part.h b/include/part.h
index 4f5a570..29c0320 100644
--- a/include/part.h
+++ b/include/part.h
@@ -44,7 +44,7 @@
 	unsigned long	(*block_read)(int dev,
 				      unsigned long start,
 				      lbaint_t blkcnt,
-				      unsigned long *buffer);
+				      void *buffer);
 	unsigned long	(*block_write)(int dev,
 				       unsigned long start,
 				       lbaint_t blkcnt,