diff --git a/objectstore/RetrieveQueueAlgorithms.hpp b/objectstore/RetrieveQueueAlgorithms.hpp
index 828e0dba4c9e4c429058e88e86d92cb2982689e8..18e7f27cfb7aa20c3d7d5fd33d3777ca2cfae3a8 100644
--- a/objectstore/RetrieveQueueAlgorithms.hpp
+++ b/objectstore/RetrieveQueueAlgorithms.hpp
@@ -573,4 +573,8 @@ auto ContainerTraits<RetrieveQueue,RetrieveQueueToTransfer>::
 getPoppingElementsCandidates(Container &cont, PopCriteria &unfulfilledCriteria, ElementsToSkipSet &elementsToSkip,
   log::LogContext &lc) -> PoppedElementsBatch;
 
+template<>
+auto ContainerTraits<RetrieveQueue,RetrieveQueueToTransfer>::
+getElementSummary(const PoppedElement &poppedElement) -> PoppedElementsSummary;
+
 }} // namespace cta::objectstore