diff --git a/include/linux/page_size_compat.h b/include/linux/page_size_compat.h
index 644dc7e91ff4..7dcdc993aea0 100644
--- a/include/linux/page_size_compat.h
+++ b/include/linux/page_size_compat.h
@@ -40,6 +40,7 @@
 DECLARE_STATIC_KEY_FALSE(page_shift_compat_enabled);
 extern int page_shift_compat __ro_after_init;
 
+#ifdef CONFIG_X86_64
 static __always_inline unsigned __page_shift(void)
 {
 	if (static_branch_unlikely(&page_shift_compat_enabled))
@@ -47,6 +48,9 @@ static __always_inline unsigned __page_shift(void)
 	else
 		return PAGE_SHIFT;
 }
+#else	/* !CONFIG_X86_64 */
+#define __page_shift() 	PAGE_SHIFT
+#endif	/* CONFIG_X86_64 */
 
 #define __PAGE_SHIFT 			__page_shift()
 #define __PAGE_SIZE 			(_AC(1,UL) << __PAGE_SHIFT)