diff --git a/src/iso19111/crs.cpp b/src/iso19111/crs.cpp
index 7a123bdf51..d858f7778d 100644
--- a/src/iso19111/crs.cpp
+++ b/src/iso19111/crs.cpp
@@ -561,9 +561,9 @@ CRSNNPtr CRS::createBoundCRSToWGS84IfPossible(
             auto extent1 = l_domains[1]->domainOfValidity();
             if (extent0 && extent1) {
                 if (extent0->contains(NN_NO_CHECK(extent1))) {
-                    extent = extent0;
+                    extent = std::move(extent0);
                 } else if (extent1->contains(NN_NO_CHECK(extent0))) {
-                    extent = extent1;
+                    extent = std::move(extent1);
                 }
             }
         }
diff --git a/src/iso19111/operation/coordinateoperationfactory.cpp b/src/iso19111/operation/coordinateoperationfactory.cpp
index b8673d056b..a5385cf504 100644
--- a/src/iso19111/operation/coordinateoperationfactory.cpp
+++ b/src/iso19111/operation/coordinateoperationfactory.cpp
@@ -5360,8 +5360,10 @@ void CoordinateOperationFactory::Private::createOperationsVertToGeogSynthetized(
     const auto dbContext =
         authFactory ? authFactory->databaseContext().as_nullable() : nullptr;
 
-    const auto vertDatumName = vertSrc->datumNonNull(dbContext)->nameStr();
-    const auto geogDstDatumName = geogDst->datumNonNull(dbContext)->nameStr();
+    const auto vertDatum = vertSrc->datumNonNull(dbContext);
+    const auto &vertDatumName = vertDatum->nameStr();
+    const auto geogDstDatum = geogDst->datumNonNull(dbContext);
+    const auto &geogDstDatumName = geogDstDatum->nameStr();
     // We accept a vertical CRS whose datum name is the same datum name as the
     // source geographic CRS, or whose datum name is "Ellipsoid" if it is part
     // of a CompoundCRS whose horizontal CRS has a geodetic datum of the same