1 files changed, 6 insertions, 1 deletions
diff --git a/src/google/protobuf/unittest_optimize_for.proto b/src/google/protobuf/unittest_optimize_for.proto
index feecbef..541d47f 100644
--- a/src/google/protobuf/unittest_optimize_for.proto
+++ b/src/google/protobuf/unittest_optimize_for.proto
@@ -50,12 +50,17 @@ message TestOptimizedForSize {
     optional int32 test_extension = 1234;
     optional TestRequiredOptimizedForSize test_extension2 = 1235;
   }
+
+  oneof foo {
+    int32 integer_field = 2;
+    string string_field = 3;
+  }
 }
 
 message TestRequiredOptimizedForSize {
   required int32 x = 1;
 }
- 
+
 message TestOptionalOptimizedForSize {
   optional TestRequiredOptimizedForSize o = 1;
 }