diff --git a/k4EDM4hep2LcioConv/include/k4EDM4hep2LcioConv/k4EDM4hep2LcioConv.ipp b/k4EDM4hep2LcioConv/include/k4EDM4hep2LcioConv/k4EDM4hep2LcioConv.ipp
index 93157c7..ed8fe4c 100644
--- a/k4EDM4hep2LcioConv/include/k4EDM4hep2LcioConv/k4EDM4hep2LcioConv.ipp
+++ b/k4EDM4hep2LcioConv/include/k4EDM4hep2LcioConv/k4EDM4hep2LcioConv.ipp
@@ -342,7 +342,8 @@ std::unique_ptr<lcio::LCCollectionVec> convertTPCHits(const edm4hep::RawTimeSeri
     if (edm_tpchit.isAvailable()) {
       auto* lcio_tpchit = new lcio::TPCHitImpl();
 
-#warning "unsigned long long conversion to int"
+#pragma message "unsigned long long conversion to int"
+
       lcio_tpchit->setCellID(edm_tpchit.getCellID());
       lcio_tpchit->setTime(edm_tpchit.getTime());
       lcio_tpchit->setCharge(edm_tpchit.getCharge());