diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 85692c9f649640a05a274ed75e21df40d5767b1b..977a54255fb48752c553237199d68c08db8b765b 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1370,7 +1370,7 @@ static void __init xen_reserve_top(void)
 	if (HYPERVISOR_xen_version(XENVER_platform_parameters, &pp) == 0)
 		top = pp.virt_start;
 
-	reserve_top_address(-top + 2 * PAGE_SIZE);
+	reserve_top_address(-top);
 #endif	/* CONFIG_X86_32 */
 }