diff --git a/DataFormats/EgammaCandidates/src/classes_def.xml b/DataFormats/EgammaCandidates/src/classes_def.xml
index a3d552704bcef..fc5c032e705fe 100644
--- a/DataFormats/EgammaCandidates/src/classes_def.xml
+++ b/DataFormats/EgammaCandidates/src/classes_def.xml
@@ -52,8 +52,8 @@
    <version ClassVersion="11" checksum="3200292660"/>
    <version ClassVersion="12" checksum="114160170"/>
   </class>
-  <class name="reco::Photon::PflowIDVariables"  ClassVersion="-1">
-   <version ClassVersion="-1" checksum="2819734289"/>
+  <class name="reco::Photon::PflowIDVariables"  ClassVersion="3">
+   <version ClassVersion="3" checksum="2819734289"/>
   </class>
   <class name="reco::Photon::EnergyCorrections"  ClassVersion="16">
    <version ClassVersion="16" checksum="1544393913"/>
diff --git a/SimDataFormats/PileupSummaryInfo/src/classes_def.xml b/SimDataFormats/PileupSummaryInfo/src/classes_def.xml
index 5a880d2c71416..9dd6f6a00daf3 100644
--- a/SimDataFormats/PileupSummaryInfo/src/classes_def.xml
+++ b/SimDataFormats/PileupSummaryInfo/src/classes_def.xml
@@ -13,8 +13,8 @@
   <class name="std::vector<PileupMixingContent>"/>  
   <class name="edm::Wrapper<PileupMixingContent>"/>
   <class name="edm::Wrapper<std::vector<PileupMixingContent> >"/>
-  <class name="PileupVertexContent" ClassVersion="-1">
-   <version ClassVersion="-1" checksum="3263569137"/>
+  <class name="PileupVertexContent" ClassVersion="3">
+   <version ClassVersion="3" checksum="3263569137"/>
   </class>
   <class name="std::vector<PileupVertexContent>"/>  
   <class name="edm::Wrapper<PileupVertexContent>"/>