diff --git a/DataProducts/src/classes.h b/DataProducts/src/classes.h
index 69c9411e58..e6dae22547 100644
--- a/DataProducts/src/classes.h
+++ b/DataProducts/src/classes.h
@@ -4,6 +4,7 @@
 //
 
 #include "canvas/Persistency/Common/Wrapper.h"
+#include "canvas/Persistency/Common/Sampled.h"
 #include "cetlib/map_vector.h"
 #include "boost/array.hpp"
 #include <vector>
diff --git a/DataProducts/src/classes_def.xml b/DataProducts/src/classes_def.xml
index 5d0e04e9a6..557da2feb9 100644
--- a/DataProducts/src/classes_def.xml
+++ b/DataProducts/src/classes_def.xml
@@ -60,10 +60,14 @@
  <class name="art::Wrapper<mu2e::STMTestBeamEventInfo>" />
 
 <!--  ********* filter  ********* -->
- <class name="mu2e::FilterFraction"/>
- <class name="art::Wrapper<mu2e::FilterFraction>" />
- <class name="mu2e::PrescaleFilterFraction"/>
- <class name="art::Wrapper<mu2e::PrescaleFilterFraction>" />
+<class name="mu2e::FilterFraction"/>
+<class name="art::Wrapper<mu2e::FilterFraction>" />
+<class name="mu2e::PrescaleFilterFraction"/>
+<class name="art::Wrapper<mu2e::PrescaleFilterFraction>" />
+<class name="map<art::SubRunID,mu2e::PrescaleFilterFraction>"/>
+<class name="map<string,map<art::SubRunID,mu2e::PrescaleFilterFraction> >"/>
+<class name="art::Sampled<mu2e::PrescaleFilterFraction>"/>
+<class name="art::Wrapper<art::Sampled<mu2e::PrescaleFilterFraction> >"/>
 
 <!--  ********* general  ********* -->
  <class name="mu2e::SurfaceIdDetail"/>