diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index b40cc37bac..78bd61e18f 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -407,6 +407,9 @@ static x86_def_t builtin_x86_defs[] = {
     {
         .name = "core2duo",
         .level = 10,
+        .vendor1 = CPUID_VENDOR_INTEL_1,
+        .vendor2 = CPUID_VENDOR_INTEL_2,
+        .vendor3 = CPUID_VENDOR_INTEL_3,
         .family = 6,
         .model = 15,
         .stepping = 11,
@@ -451,6 +454,9 @@ static x86_def_t builtin_x86_defs[] = {
     {
         .name = "qemu32",
         .level = 4,
+        .vendor1 = CPUID_VENDOR_INTEL_1,
+        .vendor2 = CPUID_VENDOR_INTEL_2,
+        .vendor3 = CPUID_VENDOR_INTEL_3,
         .family = 6,
         .model = 3,
         .stepping = 3,
@@ -461,6 +467,9 @@ static x86_def_t builtin_x86_defs[] = {
     {
         .name = "kvm32",
         .level = 5,
+        .vendor1 = CPUID_VENDOR_INTEL_1,
+        .vendor2 = CPUID_VENDOR_INTEL_2,
+        .vendor3 = CPUID_VENDOR_INTEL_3,
         .family = 15,
         .model = 6,
         .stepping = 1,
@@ -475,6 +484,9 @@ static x86_def_t builtin_x86_defs[] = {
     {
         .name = "coreduo",
         .level = 10,
+        .vendor1 = CPUID_VENDOR_INTEL_1,
+        .vendor2 = CPUID_VENDOR_INTEL_2,
+        .vendor3 = CPUID_VENDOR_INTEL_3,
         .family = 6,
         .model = 14,
         .stepping = 8,
@@ -490,6 +502,9 @@ static x86_def_t builtin_x86_defs[] = {
     {
         .name = "486",
         .level = 1,
+        .vendor1 = CPUID_VENDOR_INTEL_1,
+        .vendor2 = CPUID_VENDOR_INTEL_2,
+        .vendor3 = CPUID_VENDOR_INTEL_3,
         .family = 4,
         .model = 0,
         .stepping = 0,
@@ -499,6 +514,9 @@ static x86_def_t builtin_x86_defs[] = {
     {
         .name = "pentium",
         .level = 1,
+        .vendor1 = CPUID_VENDOR_INTEL_1,
+        .vendor2 = CPUID_VENDOR_INTEL_2,
+        .vendor3 = CPUID_VENDOR_INTEL_3,
         .family = 5,
         .model = 4,
         .stepping = 3,
@@ -508,6 +526,9 @@ static x86_def_t builtin_x86_defs[] = {
     {
         .name = "pentium2",
         .level = 2,
+        .vendor1 = CPUID_VENDOR_INTEL_1,
+        .vendor2 = CPUID_VENDOR_INTEL_2,
+        .vendor3 = CPUID_VENDOR_INTEL_3,
         .family = 6,
         .model = 5,
         .stepping = 2,
@@ -517,6 +538,9 @@ static x86_def_t builtin_x86_defs[] = {
     {
         .name = "pentium3",
         .level = 2,
+        .vendor1 = CPUID_VENDOR_INTEL_1,
+        .vendor2 = CPUID_VENDOR_INTEL_2,
+        .vendor3 = CPUID_VENDOR_INTEL_3,
         .family = 6,
         .model = 7,
         .stepping = 3,
@@ -542,6 +566,9 @@ static x86_def_t builtin_x86_defs[] = {
         .name = "n270",
         /* original is on level 10 */
         .level = 5,
+        .vendor1 = CPUID_VENDOR_INTEL_1,
+        .vendor2 = CPUID_VENDOR_INTEL_2,
+        .vendor3 = CPUID_VENDOR_INTEL_3,
         .family = 6,
         .model = 28,
         .stepping = 2,
@@ -1534,15 +1561,10 @@ int cpu_x86_register(X86CPU *cpu, const char *cpu_model)
     if (cpu_x86_parse_featurestr(def, features) < 0) {
         goto error;
     }
-    if (def->vendor1) {
-        env->cpuid_vendor1 = def->vendor1;
-        env->cpuid_vendor2 = def->vendor2;
-        env->cpuid_vendor3 = def->vendor3;
-    } else {
-        env->cpuid_vendor1 = CPUID_VENDOR_INTEL_1;
-        env->cpuid_vendor2 = CPUID_VENDOR_INTEL_2;
-        env->cpuid_vendor3 = CPUID_VENDOR_INTEL_3;
-    }
+    assert(def->vendor1);
+    env->cpuid_vendor1 = def->vendor1;
+    env->cpuid_vendor2 = def->vendor2;
+    env->cpuid_vendor3 = def->vendor3;
     env->cpuid_vendor_override = def->vendor_override;
     object_property_set_int(OBJECT(cpu), def->level, "level", &error);
     object_property_set_int(OBJECT(cpu), def->family, "family", &error);