diff --git a/src/memory/Memory.cc b/src/memory/Memory.cc
index b832fbd..df8377b 100644
--- a/src/memory/Memory.cc
+++ b/src/memory/Memory.cc
@@ -57,8 +57,8 @@ MemoryManager::initializeGDT()
 
 namespace memory {
 
-const u32 pageSize = 4096;
-const u32 pageMask = pageSize - 1;
+const usize pageSize = 4096;
+const usize pageMask = pageSize - 1;
 
 } /* namespace memory */
 
diff --git a/src/memory/Memory.hh b/src/memory/Memory.hh
index f012f67..44e81fd 100644
--- a/src/memory/Memory.hh
+++ b/src/memory/Memory.hh
@@ -32,8 +32,8 @@ private:
 
 namespace memory {
 
-extern const u32 pageSize;
-extern const u32 pageMask;
+extern const usize pageSize;
+extern const usize pageMask;
 
 /** Align to the nearest page boundary below `addr`. */
 inline u32