diff --git a/Event/EventPacker/src/lib/PackedPartToRelatedInfoRelation.cpp b/Event/EventPacker/src/lib/PackedPartToRelatedInfoRelation.cpp
index 457ce2aac9f2b235a73743fb2076fd6cbcbe1a05..63e006cfd520b0890dcd8931c9e84f9b0e9e27ce 100644
--- a/Event/EventPacker/src/lib/PackedPartToRelatedInfoRelation.cpp
+++ b/Event/EventPacker/src/lib/PackedPartToRelatedInfoRelation.cpp
@@ -105,7 +105,7 @@ StatusCode RelatedInfoRelationsPacker::unpack( const LHCb::PackedRelatedInfoMap&
   auto* from = srcContainer->object( srcKey );
   if ( from ) {
     // Recreate the RelatedInfoMap
-    TO to;
+    TO to( pmap.dictVersion );
     to.reserve( pmap.last - pmap.first );
     for ( const auto& jj : Packer::subrange( prels.info(), pmap.first, pmap.last ) ) { to.insert( jj ); }
     // Save the relation