2 files changed, 11 insertions, 1 deletions
diff --git a/searchcore/src/tests/proton/common/attribute_updater/attribute_updater_test.cpp b/searchcore/src/tests/proton/common/attribute_updater/attribute_updater_test.cpp
index 892be2c874f..8c3ce4c5031 100644
--- a/searchcore/src/tests/proton/common/attribute_updater/attribute_updater_test.cpp
+++ b/searchcore/src/tests/proton/common/attribute_updater/attribute_updater_test.cpp
@@ -436,6 +436,15 @@ TEST_F("require that tensor modify update is applied",
     f.assertTensor(TensorSpec(f.type).add({{"x", 0}}, 7).add({{"x", 1}}, 5));
 }
 
+TEST_F("require that tensor modify update with 'create: true' is applied to non-existing tensor",
+       TensorFixture<DenseTensorAttribute>("tensor(x[2])", "dense_tensor"))
+{
+    f.applyValueUpdate(*f.attribute, 1,
+                       std::make_unique<TensorModifyUpdate>(TensorModifyUpdate::Operation::ADD,
+                                                            makeTensorFieldValue(TensorSpec("tensor(x{})").add({{"x", "1"}}, 3)), 0.0));
+    f.assertTensor(TensorSpec(f.type).add({{"x", 0}}, 0).add({{"x", 1}}, 3));
+}
+
 TEST_F("require that tensor add update is applied",
         TensorFixture<SerializedFastValueAttribute>("tensor(x{})", "sparse_tensor"))
 {
diff --git a/searchcore/src/vespa/searchcore/proton/common/attribute_updater.cpp b/searchcore/src/vespa/searchcore/proton/common/attribute_updater.cpp
index ef9750b5f4c..2b78cdab966 100644
--- a/searchcore/src/vespa/searchcore/proton/common/attribute_updater.cpp
+++ b/searchcore/src/vespa/searchcore/proton/common/attribute_updater.cpp
@@ -223,7 +223,8 @@ AttributeUpdater::handleUpdate(TensorAttribute &vec, uint32_t lid, const ValueUp
             updateValue(vec, lid, assign.getValue());
         }
     } else if (op == ValueUpdate::TensorModify) {
-        vec.update_tensor(lid, static_cast<const TensorModifyUpdate &>(upd), false);
+        const auto& modify = static_cast<const TensorModifyUpdate&>(upd);
+        vec.update_tensor(lid, modify, modify.get_default_cell_value().has_value());
     } else if (op == ValueUpdate::TensorAdd) {
         vec.update_tensor(lid, static_cast<const TensorAddUpdate &>(upd), true);
     } else if (op == ValueUpdate::TensorRemove) {