diff --git a/src/cpu/cpu_x86.c b/src/cpu/cpu_x86.c
index b177885f5e..a6cbd45766 100644
--- a/src/cpu/cpu_x86.c
+++ b/src/cpu/cpu_x86.c
@@ -531,7 +531,8 @@ virCPUx86VendorToCPUID(const char *vendor,
 
 static uint32_t
 x86MakeSignature(unsigned int family,
-                 unsigned int model)
+                 unsigned int model,
+                 unsigned int stepping)
 {
     uint32_t sig = 0;
 
@@ -551,6 +552,7 @@ x86MakeSignature(unsigned int family,
      *
      * family = eax[27:20] + eax[11:8]
      * model = eax[19:16] << 4 + eax[7:4]
+     * stepping = eax[3:0]
      */
 
     /* extFam */
@@ -570,9 +572,8 @@ x86MakeSignature(unsigned int family,
     /* Mod */
     sig |= (model & 0xf) << 4;
 
-    /* Step is irrelevant, it is used to distinguish different revisions
-     * of the same CPU model
-     */
+    /* Step */
+    sig |= stepping & 0xf;
 
     return sig;
 }
@@ -1248,7 +1249,7 @@ x86ModelParse(xmlXPathContextPtr ctxt,
             goto cleanup;
         }
 
-        model->signature = x86MakeSignature(sigFamily, sigModel);
+        model->signature = x86MakeSignature(sigFamily, sigModel, 0);
     }
 
     if (virXPathBoolean("boolean(./vendor)", ctxt)) {
@@ -2971,9 +2972,10 @@ virCPUx86DataAddCPUID(virCPUDataPtr cpuData,
 int
 virCPUx86DataSetSignature(virCPUDataPtr cpuData,
                           unsigned int family,
-                          unsigned int model)
+                          unsigned int model,
+                          unsigned int stepping)
 {
-    uint32_t signature = x86MakeSignature(family, model);
+    uint32_t signature = x86MakeSignature(family, model, stepping);
 
     return x86DataAddSignature(&cpuData->data.x86, signature);
 }
diff --git a/src/cpu/cpu_x86.h b/src/cpu/cpu_x86.h
index 91ec43fea9..5d14d83e1b 100644
--- a/src/cpu/cpu_x86.h
+++ b/src/cpu/cpu_x86.h
@@ -34,7 +34,8 @@ int virCPUx86DataAddCPUID(virCPUDataPtr cpuData,
 
 int virCPUx86DataSetSignature(virCPUDataPtr cpuData,
                               unsigned int family,
-                              unsigned int model);
+                              unsigned int model,
+                              unsigned int stepping);
 
 int virCPUx86DataSetVendor(virCPUDataPtr cpuData,
                            const char *vendor);
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 4de411e397..6cea1ccfa5 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -3353,6 +3353,7 @@ virQEMUCapsInitCPUModelX86(virQEMUCapsPtr qemuCaps,
     virCPUDataPtr data = NULL;
     unsigned long long sigFamily = 0;
     unsigned long long sigModel = 0;
+    unsigned long long sigStepping = 0;
     int ret = -1;
     size_t i;
 
@@ -3387,6 +3388,8 @@ virQEMUCapsInitCPUModelX86(virQEMUCapsPtr qemuCaps,
                 sigFamily = prop->value.number;
             else if (STREQ(prop->name, "model"))
                 sigModel = prop->value.number;
+            else if (STREQ(prop->name, "stepping"))
+                sigStepping = prop->value.number;
             break;
 
         case QEMU_MONITOR_CPU_PROPERTY_LAST:
@@ -3394,7 +3397,7 @@ virQEMUCapsInitCPUModelX86(virQEMUCapsPtr qemuCaps,
         }
     }
 
-    if (virCPUx86DataSetSignature(data, sigFamily, sigModel) < 0)
+    if (virCPUx86DataSetSignature(data, sigFamily, sigModel, sigStepping) < 0)
         goto cleanup;
 
     if (cpuDecode(cpu, data, virQEMUCapsGetCPUDefinitions(qemuCaps, type)) < 0)