diff --git a/include/asm-alpha/page.h b/include/asm-alpha/page.h
index bae7f05..8cc97bf 100644
--- a/include/asm-alpha/page.h
+++ b/include/asm-alpha/page.h
@@ -3,11 +3,12 @@
 
 #ifdef __KERNEL__
 
+#include <linux/const.h>
 #include <asm/pal.h>
 
 /* PAGE_SHIFT determines the page size */
 #define PAGE_SHIFT	13
-#define PAGE_SIZE	(1UL << PAGE_SHIFT)
+#define PAGE_SIZE	(_AC(1,UL) << PAGE_SHIFT)
 #define PAGE_MASK	(~(PAGE_SIZE-1))
 
 #ifndef __ASSEMBLY__