diff --git a/src/arch/x86/cpuid.cc b/src/arch/x86/cpuid.cc
index 2656cd94e..f3f9a82d7 100644
--- a/src/arch/x86/cpuid.cc
+++ b/src/arch/x86/cpuid.cc
@@ -131,7 +131,7 @@ namespace X86ISA {
                                      0x69746e65, 0x444d4163);
                 break;
               case LongModeAddressSize:
-                result = CpuidResult(0x0000ffff, 0x00000000,
+                result = CpuidResult(0x00003030, 0x00000000,
                                      0x00000000, 0x00000000);
                 break;
 /*            case SVMInfo: