diff --git a/k4EDM4hep2LcioConv/include/k4EDM4hep2LcioConv/k4EDM4hep2LcioConv.ipp b/k4EDM4hep2LcioConv/include/k4EDM4hep2LcioConv/k4EDM4hep2LcioConv.ipp
index 6d59485..a95eb72 100644
--- a/k4EDM4hep2LcioConv/include/k4EDM4hep2LcioConv/k4EDM4hep2LcioConv.ipp
+++ b/k4EDM4hep2LcioConv/include/k4EDM4hep2LcioConv/k4EDM4hep2LcioConv.ipp
@@ -420,7 +420,7 @@ std::unique_ptr<lcio::LCCollectionVec> convertVertices(const edm4hep::VertexColl
   for (const auto& edm_vertex : (*edmCollection)) {
     if (edm_vertex.isAvailable()) {
       auto* lcio_vertex = new lcio::VertexImpl();
-      lcio_vertex->setPrimary(edm_vertex.getPrimary());
+      lcio_vertex->setPrimary(edm_vertex.isPrimary());
       lcio_vertex->setAlgorithmType(std::to_string(edm_vertex.getAlgorithmType()));
       lcio_vertex->setChi2(edm_vertex.getChi2());
       lcio_vertex->setProbability(TMath::Prob(edm_vertex.getChi2(), edm_vertex.getNdf()));
diff --git a/tests/src/CompareEDM4hepLCIO.cc b/tests/src/CompareEDM4hepLCIO.cc
index 4279df6..c703edc 100644
--- a/tests/src/CompareEDM4hepLCIO.cc
+++ b/tests/src/CompareEDM4hepLCIO.cc
@@ -416,8 +416,7 @@ bool compare(const lcio::LCCollection* lcioCollection, const edm4hep::TrackerHit
 // ================= Vertex ================
 
 bool compare(const EVENT::Vertex* lcioElem, const edm4hep::Vertex& edm4hepElem, const ObjectMappings& objectMaps) {
-  // LCIO has isPrimary (bool), EDM4hep has getPrimary (int32_t)
-  ASSERT_COMPARE_VALS(lcioElem->isPrimary(), edm4hepElem.getPrimary(), "primary in Vertex");
+  ASSERT_COMPARE(lcioElem, edm4hepElem, isPrimary, "primary in Vertex");
   ASSERT_COMPARE(lcioElem, edm4hepElem, getChi2, "chi2 in Vertex");
   ASSERT_COMPARE_VALS_FLOAT(lcioElem->getProbability(), TMath::Prob(edm4hepElem.getChi2(), edm4hepElem.getNdf()), 1e-6,
                             "probability in Vertex");