diff --git a/ChangeLog b/ChangeLog
index af794aa5f..dc190113c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2007-10-27  Robert Millan  <rmh@aybabtu.com>
+
+	* include/grub/types.h: Define ULONG_MAX.
+
 2007-10-22  Robert Millan  <rmh@aybabtu.com>
 
 	* kern/i386/pc/startup.S: Remove `"kern/i386/realmode.S"'.  Include
diff --git a/include/grub/types.h b/include/grub/types.h
index 12b4938b2..c51652ff0 100644
--- a/include/grub/types.h
+++ b/include/grub/types.h
@@ -92,6 +92,12 @@ typedef grub_uint32_t	grub_size_t;
 typedef grub_int32_t	grub_ssize_t;
 #endif
 
+#if GRUB_CPU_SIZEOF_VOID_P == 8
+# define ULONG_MAX 18446744073709551615UL
+#else
+# define ULONG_MAX 4294967295UL
+#endif
+
 /* The type for representing a file offset.  */
 typedef grub_uint64_t	grub_off_t;