diff --git a/include/asm-sh/page.h b/include/asm-sh/page.h
index 888d6fe0030e053a24865d06884e2e067bffa2b8..acf6977b404251ef4e2ad94496a49474ef5c560a 100644
--- a/include/asm-sh/page.h
+++ b/include/asm-sh/page.h
@@ -16,7 +16,13 @@
 
 /* PAGE_SHIFT determines the page size */
 #define PAGE_SHIFT	12
+
+#ifdef __ASSEMBLY__
 #define PAGE_SIZE	(1 << PAGE_SHIFT)
+#else
+#define PAGE_SIZE	(1UL << PAGE_SHIFT)
+#endif
+
 #define PAGE_MASK	(~(PAGE_SIZE-1))
 #define PTE_MASK	PAGE_MASK