diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 696b14a..bab1ef8 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -163,7 +163,7 @@ uint32_t kvm_arch_get_supported_cpuid(KVMState *s, uint32_t function,
                      * so add missing bits according to the AMD spec:
                      */
                     cpuid_1_edx = kvm_arch_get_supported_cpuid(s, 1, 0, R_EDX);
-                    ret |= cpuid_1_edx & 0x183f7ff;
+                    ret |= cpuid_1_edx & 0x183f3ff;
                     break;
                 }
                 break;