diff --git a/google/cloud/source_context_v1/types/source_context.py b/google/cloud/source_context_v1/types/source_context.py
index 8867017..8e5d8d2 100644
--- a/google/cloud/source_context_v1/types/source_context.py
+++ b/google/cloud/source_context_v1/types/source_context.py
@@ -13,6 +13,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+from __future__ import annotations
+
 from typing import MutableMapping, MutableSequence
 
 import proto  # type: ignore