diff --git a/verify.h b/verify.h
index 49ce417..ec7365c 100644
--- a/verify.h
+++ b/verify.h
@@ -4,6 +4,7 @@
 #include <stdint.h>
 
 #define FIO_HDR_MAGIC	0xf00baaef
+#define FIO_HDR_MAGIC2	0xf00dbeef
 
 enum {
 	VERIFY_NONE = 0,		/* no verification */
@@ -28,10 +29,13 @@
  * data.
  */
 struct verify_header {
-	unsigned int fio_magic;
-	unsigned int len;
-	unsigned int verify_type;
-	unsigned long rand_seed;
+	uint32_t fio_magic;
+	uint32_t len;
+	uint32_t verify_type;
+	uint32_t pad1;
+	uint64_t rand_seed;
+	uint32_t pad2;
+	uint32_t crc32;
 };
 
 struct vhdr_md5 {