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-rw-r--r--src/google/protobuf/unittest_empty.proto1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/google/protobuf/unittest_empty.proto b/src/google/protobuf/unittest_empty.proto
index b7337ef3..36443e7e 100644
--- a/src/google/protobuf/unittest_empty.proto
+++ b/src/google/protobuf/unittest_empty.proto
@@ -35,3 +35,4 @@
// This file intentionally left blank. (At one point this wouldn't compile
// correctly.)
+syntax = "proto2";