diff --git a/src/boot/util.h b/src/boot/util.h
index 75d41e4..e9e756c 100644
--- a/src/boot/util.h
+++ b/src/boot/util.h
@@ -1,10 +1,10 @@
 #pragma once
 
-static inline uptr align_up(uptr value, uptr alignment) {
+static inline uptr align_up(uptr value, size_t alignment) {
     return (value + alignment - 1) / alignment * alignment;
 }
 
-static inline uptr align_down(uptr value, uptr alignment) {
+static inline uptr align_down(uptr value, size_t alignment) {
     return value - (value % alignment);
 }