1 files changed, 4 insertions, 2 deletions
diff --git a/tests/extensions/extensions.proto b/tests/extensions/extensions.proto
index da8432e..fcd5b43 100644
--- a/tests/extensions/extensions.proto
+++ b/tests/extensions/extensions.proto
@@ -1,3 +1,5 @@
+syntax = "proto2";
+
 import 'alltypes.proto';
 
 extend AllTypes {
@@ -7,8 +9,8 @@ extend AllTypes {
 message ExtensionMessage {
     extend AllTypes {
         optional ExtensionMessage AllTypes_extensionfield2 = 254;
-	required ExtensionMessage AllTypes_extensionfield3 = 253;
-	repeated ExtensionMessage AllTypes_extensionfield4 = 252;
+        // required ExtensionMessage AllTypes_extensionfield3 = 253; // No longer allowed by protobuf 3
+        repeated ExtensionMessage AllTypes_extensionfield4 = 252;
     }
     
     required string test1 = 1;