diff --git a/linux-2.6.8.1-xen-sparse/drivers/char/mem.c b/linux-2.6.8.1-xen-sparse/drivers/char/mem.c
index e3b99480fe..ed3df13f65 100644
--- a/linux-2.6.8.1-xen-sparse/drivers/char/mem.c
+++ b/linux-2.6.8.1-xen-sparse/drivers/char/mem.c
@@ -40,6 +40,7 @@
 
 #include <asm/uaccess.h>
 #include <asm/io.h>
+#include <asm/pgalloc.h>
 
 #ifdef CONFIG_IA64
 # include <linux/efi.h>