diff --git a/ChangeLog b/ChangeLog
index 6b81f6c67..d932ffc1a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2010-09-05  Szymon Janc <szymon@janc.net.pl>
+
+	* grub-core/lib/posix_wrap/sys/types.h (bool): Transform into an enum.
+	(uint8_t): New type.
+	(uint16_t): Likewise.
+	(uint32_t): Likewise.
+	(uint64_t): Likewise.
+
 2010-09-05  Szymon Janc <szymon@janc.net.pl>
 
 	* include/grub/crypto.h (GRUB_MD_CRC32): New definition.
diff --git a/grub-core/lib/posix_wrap/sys/types.h b/grub-core/lib/posix_wrap/sys/types.h
index ce3794087..28e354759 100644
--- a/grub-core/lib/posix_wrap/sys/types.h
+++ b/grub-core/lib/posix_wrap/sys/types.h
@@ -22,11 +22,14 @@
 #include <grub/misc.h>
 
 typedef grub_size_t size_t;
-typedef int bool;
-static const bool true = 1;
-static const bool false = 0;
+typedef enum { false = 0, true = 1 } bool;
 
 #define ULONG_MAX GRUB_ULONG_MAX
 #define UCHAR_MAX 0xff
 
+typedef grub_uint8_t uint8_t;
+typedef grub_uint16_t uint16_t;
+typedef grub_uint32_t uint32_t;
+typedef grub_uint64_t uint64_t;
+
 #endif