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Diffstat (limited to 'src/ProtocolBuffers/ExtendableBuilder.cs')
-rw-r--r--src/ProtocolBuffers/ExtendableBuilder.cs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/ProtocolBuffers/ExtendableBuilder.cs b/src/ProtocolBuffers/ExtendableBuilder.cs
index cbe203dd..137762ab 100644
--- a/src/ProtocolBuffers/ExtendableBuilder.cs
+++ b/src/ProtocolBuffers/ExtendableBuilder.cs
@@ -42,7 +42,7 @@ namespace Google.ProtocolBuffers
{
public abstract class ExtendableBuilder<TMessage, TBuilder> : GeneratedBuilder<TMessage, TBuilder>
where TMessage : ExtendableMessage<TMessage, TBuilder>
- where TBuilder : GeneratedBuilder<TMessage, TBuilder>
+ where TBuilder : GeneratedBuilder<TMessage, TBuilder>, new()
{
protected ExtendableBuilder()
{