diff --git a/SimDataFormats/CaloAnalysis/src/classes_def.xml b/SimDataFormats/CaloAnalysis/src/classes_def.xml
index f855030468142..8ba07ba0acc82 100644
--- a/SimDataFormats/CaloAnalysis/src/classes_def.xml
+++ b/SimDataFormats/CaloAnalysis/src/classes_def.xml
@@ -1,5 +1,6 @@
 <lcgdict>
-   <class name="CaloParticle"  ClassVersion="4">
+   <class name="CaloParticle"  ClassVersion="5">
+    <version ClassVersion="5" checksum="2074797506"/>
    <version ClassVersion="4" checksum="1423471036"/>
   </class>
   <class name="CaloParticleCollection"/>