diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index ba05da3f2e..02065e35d4 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -6159,7 +6159,7 @@ static void x86_cpu_machine_done(Notifier *n, void *unused)
     if (smram) {
         cpu->smram = g_new(MemoryRegion, 1);
         memory_region_init_alias(cpu->smram, OBJECT(cpu), "smram",
-                                 smram, 0, 1ull << 32);
+                                 smram, 0, 4 * GiB);
         memory_region_set_enabled(cpu->smram, true);
         memory_region_add_subregion_overlap(cpu->cpu_as_root, 0, cpu->smram, 1);
     }