diff --git a/virtinst/domain/cpu.py b/virtinst/domain/cpu.py
index d74c3ffc..e40c5307 100644
--- a/virtinst/domain/cpu.py
+++ b/virtinst/domain/cpu.py
@@ -286,6 +286,8 @@ class DomainCpu(XMLBuilder):
             self.model = None
             self.vendor = None
             self.model_fallback = None
+            self.migratable = None
+            self.check = None
             for f in self.features:
                 self.remove_child(f)
             self.mode = val