diff --git a/sysconfigs/target/target-x86_64.conf b/sysconfigs/target/target-x86_64.conf
index a0df33c..fd4e421 100644
--- a/sysconfigs/target/target-x86_64.conf
+++ b/sysconfigs/target/target-x86_64.conf
@@ -9,7 +9,7 @@
    stepping = "3"
    feature_edx = "sse2 sse fxsr mmx pat cmov pge sep apic cx8 mce pae msr tsc pse de fpu    mtrr clflush mca pse36"
    feature_ecx = "sse3 ssse3 x2apic"
-   extfeature_edx = "fxsr mmx pat cmov pge apic cx8 mce pae msr tsc pse de fpu    lm syscall nx"
+   extfeature_edx = "fxsr mmx pat cmov pge apic cx8 mce pae msr tsc pse de fpu    i64 syscall xd"
    extfeature_ecx = "lahf_lm"
    xlevel = "0x8000000A"
    model_id = "Intel Celeron_4x0 (Conroe/Merom Class Core 2)"
@@ -23,7 +23,7 @@
    stepping = "3"
    feature_edx = "sse2 sse fxsr mmx pat cmov pge sep apic cx8 mce pae msr tsc pse de fpu    mtrr clflush mca pse36"
    feature_ecx = "sse3 cx16 ssse3 sse4.1 x2apic"
-   extfeature_edx = "fxsr mmx pat cmov pge apic cx8 mce pae msr tsc pse de fpu    lm syscall nx"
+   extfeature_edx = "fxsr mmx pat cmov pge apic cx8 mce pae msr tsc pse de fpu    i64 syscall xd"
    extfeature_ecx = "lahf_lm"
    xlevel = "0x8000000A"
    model_id = "Intel Core 2 Duo P9xxx (Penryn Class Core 2)"
@@ -37,7 +37,7 @@
    stepping = "3"
    feature_edx = "sse2 sse fxsr mmx pat cmov pge sep apic cx8 mce pae msr tsc pse de fpu    mtrr clflush mca pse36"
    feature_ecx = "sse3 cx16 ssse3 sse4.1 sse4.2 popcnt x2apic"
-   extfeature_edx = "fxsr mmx pat cmov pge apic cx8 mce pae msr tsc pse de fpu    lm syscall nx"
+   extfeature_edx = "fxsr mmx pat cmov pge apic cx8 mce pae msr tsc pse de fpu    i64 syscall xd"
    extfeature_ecx = "lahf_lm"
    xlevel = "0x8000000A"
    model_id = "Intel Core i7 9xx (Nehalem Class Core i7)"
diff --git a/target-i386/cpuid.c b/target-i386/cpuid.c
index c151f12..fc72f7b 100644
--- a/target-i386/cpuid.c
+++ b/target-i386/cpuid.c
@@ -57,9 +57,9 @@ static const char *ext2_feature_name[] = {
     "cx8" /* AMD CMPXCHG8B */, "apic", NULL, "syscall",
     "mtrr", "pge", "mca", "cmov",
     "pat", "pse36", NULL, NULL /* Linux mp */,
-    "nx" /* Intel xd */, NULL, "mmxext", "mmx",
+    "nx|xd", NULL, "mmxext", "mmx",
     "fxsr", "fxsr_opt" /* AMD ffxsr */, "pdpe1gb" /* AMD Page1GB */, "rdtscp",
-    NULL, "lm" /* Intel 64 */, "3dnowext", "3dnow",
+    NULL, "lm|i64", "3dnowext", "3dnow",
 };
 static const char *ext3_feature_name[] = {
     "lahf_lm" /* AMD LahfSahf */, "cmp_legacy", "svm", "extapic" /* AMD ExtApicSpace */,