diff --git a/arch/microblaze/include/asm/posix_types.h b/arch/microblaze/include/asm/posix_types.h
index 38dc5aa85d..ccc6235c8d 100644
--- a/arch/microblaze/include/asm/posix_types.h
+++ b/arch/microblaze/include/asm/posix_types.h
@@ -27,7 +27,11 @@ typedef int		__kernel_pid_t;
 typedef unsigned short	__kernel_ipc_pid_t;
 typedef unsigned int	__kernel_uid_t;
 typedef unsigned int	__kernel_gid_t;
+#ifdef __GNUC__
+typedef __SIZE_TYPE__  __kernel_size_t;
+#else
 typedef unsigned int	__kernel_size_t;
+#endif
 typedef int		__kernel_ssize_t;
 typedef int		__kernel_ptrdiff_t;
 typedef long		__kernel_time_t;