diff --git a/src/cpu/cpu_x86_data.h b/src/cpu/cpu_x86_data.h
index 2607dd96b16903589ed4fb57a02b486f59689201..cc0c93dff012b3c2135780bbe4affea7c6da2afd 100644
--- a/src/cpu/cpu_x86_data.h
+++ b/src/cpu/cpu_x86_data.h
@@ -43,7 +43,7 @@ struct _virCPUx86MSR {
 #define CPUX86_KVM      0x40000000
 #define CPUX86_EXTENDED 0x80000000
 
-#define VIR_CPU_x86_KVM_PV_UNHALT    "__kvm_pv_unhalt"
+#define VIR_CPU_x86_KVM_PV_UNHALT   "kvm_pv_unhalt"
 
 /*
  * The following HyperV feature names suffixes must exactly match corresponding
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 7b2cfa06831d57e3e2e4acc7c69eb681388202b8..fee51158a97d2d13599c7e73a0eb9e4143018c85 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -7146,7 +7146,7 @@ qemuBuildCpuCommandLine(virCommandPtr cmd,
     }
 
     if (def->features[VIR_DOMAIN_FEATURE_PVSPINLOCK]) {
-        qemuBuildCpuFeature(qemuCaps, &buf, "kvm_pv_unhalt",
+        qemuBuildCpuFeature(qemuCaps, &buf, VIR_CPU_x86_KVM_PV_UNHALT,
                             def->features[VIR_DOMAIN_FEATURE_PVSPINLOCK] == VIR_TRISTATE_SWITCH_ON);
     }