diff --git a/DataFormats/Common/src/classes_def.xml b/DataFormats/Common/src/classes_def.xml
index 82c7ac6170501..9c70e196b9404 100644
--- a/DataFormats/Common/src/classes_def.xml
+++ b/DataFormats/Common/src/classes_def.xml
@@ -10,7 +10,7 @@
  </class>
  <class name="edm::RefCore" ClassVersion="11">
   <version ClassVersion="10" checksum="641105393"/>
-  <version ClassVersion="11" checksum="3425324092"/>
+  <version ClassVersion="11" checksum="3425324093"/>
    <field name="cachePtr_" transient = "true"/>
  </class>
  <ioread sourceClass = "edm::RefCore" version="[1-]" targetClass="edm::RefCore" source="" target="cachePtr_">