diff --git a/src/ROOTDataSource.cc b/src/ROOTDataSource.cc
index 9ee09cc53..9d00ad85a 100644
--- a/src/ROOTDataSource.cc
+++ b/src/ROOTDataSource.cc
@@ -127,7 +127,7 @@ void ROOTDataSource::SetNSlots(unsigned int nSlots) {
   }
 
   for (size_t i = 0; i < m_nSlots; ++i) {
-    m_frames.emplace_back(std::make_unique<podio::Frame>(podio::Frame(m_podioReaders[i]->readEntry("events", 0))));
+    m_frames.emplace_back(std::make_unique<podio::Frame>(podio::Frame{}));
   }
 }
 
diff --git a/src/root_selection.xml b/src/root_selection.xml
index 38db949c0..4accb24a3 100644
--- a/src/root_selection.xml
+++ b/src/root_selection.xml
@@ -5,5 +5,6 @@
     <class name="podio::ROOTWriter"/>
     <class name="podio::RNTupleReader"/>
     <class name="podio::RNTupleWriter"/>
+    <class name="podio::ROOTDataSource"/>
   </selection>
 </lcgdict>