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-rw-r--r--test/cpp/util/echo.proto2
1 files changed, 1 insertions, 1 deletions
diff --git a/test/cpp/util/echo.proto b/test/cpp/util/echo.proto
index 58ec680ecd..6bb09316b4 100644
--- a/test/cpp/util/echo.proto
+++ b/test/cpp/util/echo.proto
@@ -28,7 +28,7 @@
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-syntax = "proto2";
+syntax = "proto3";
import "test/cpp/util/messages.proto";