diff --git a/dlls/ntdll/virtual.c b/dlls/ntdll/virtual.c
index d2610e9546c..59fc491a634 100644
--- a/dlls/ntdll/virtual.c
+++ b/dlls/ntdll/virtual.c
@@ -123,7 +123,7 @@ static void *user_space_limit    = (void *)0x7fff0000;  /* top of the user addre
 static void *working_set_limit   = (void *)0x7fff0000;  /* top of the current working set */
 #else
 static UINT page_shift;
-static UINT page_size;
+static UINT_PTR page_size;
 static UINT_PTR page_mask;
 static void *address_space_limit;
 static void *user_space_limit;