diff -urN parted-1.6.6-1.1/libparted/linux.c parted-1.6.6-1.2/libparted/linux.c
--- parted-1.6.6-1.1/libparted/linux.c	2003-02-15 22:30:03.000000000 +0100
+++ parted-1.6.6-1.2/libparted/linux.c	2003-11-10 12:13:53.000000000 +0100
@@ -164,7 +164,7 @@
 #define BLKSSZGET  _IO(0x12,104) /* get block device sector size */
 #define BLKGETLASTSECT  _IO(0x12,108) /* get last sector of block device */
 #define BLKSETLASTSECT  _IO(0x12,109) /* set last sector of block device */
-#define BLKGETSIZE64 _IOR(0x12,114,sizeof(uint64_t))	/* return device size in bytes (u64 *arg) */
+#define BLKGETSIZE64 _IOR(0x12,114,size_t)	/* return device size in bytes (u64 *arg) */
 
 struct blkdev_ioctl_param {
 	unsigned int block;