diff --git a/kqemu.c b/kqemu.c
index 61983d01de1a3aa0c4def010ddd4aed0cdf98af9..b7a93b0be6d057d415a83be0a9b7a4d650dcf453 100644
--- a/kqemu.c
+++ b/kqemu.c
@@ -119,7 +119,7 @@ static int is_cpuid_supported(void)
 
 static void kqemu_update_cpuid(CPUState *env)
 {
-    int critical_features_mask, features;
+    int critical_features_mask, features, ext_features, ext_features_mask;
     uint32_t eax, ebx, ecx, edx;
 
     /* the following features are kept identical on the host and
@@ -130,11 +130,14 @@ static void kqemu_update_cpuid(CPUState *env)
         CPUID_CMOV | CPUID_CX8 | 
         CPUID_FXSR | CPUID_MMX | CPUID_SSE | 
         CPUID_SSE2 | CPUID_SEP;
+    ext_features_mask = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR;
     if (!is_cpuid_supported()) {
         features = 0;
+        ext_features = 0;
     } else {
         cpuid(1, eax, ebx, ecx, edx);
         features = edx;
+        ext_features = ecx;
     }
 #ifdef __x86_64__
     /* NOTE: on x86_64 CPUs, SYSENTER is not supported in
@@ -144,6 +147,8 @@ static void kqemu_update_cpuid(CPUState *env)
 #endif
     env->cpuid_features = (env->cpuid_features & ~critical_features_mask) |
         (features & critical_features_mask);
+    env->cpuid_ext_features = (env->cpuid_ext_features & ~ext_features_mask) |
+        (ext_features & ext_features_mask);
     /* XXX: we could update more of the target CPUID state so that the
        non accelerated code sees exactly the same CPU features as the
        accelerated code */