diff --git a/go/types.cc b/go/types.cc
index 16f0eb5..7d4c47f 100644
--- a/go/types.cc
+++ b/go/types.cc
@@ -8845,7 +8845,22 @@
   if (!this->may_receive_)
     ret->append("<-");
   ret->push_back(' ');
+
+  bool need_paren = false;
+  if (this->may_send_
+      && this->may_receive_
+      && this->element_type_->channel_type() != NULL
+      && this->element_type_->unalias()->named_type() == NULL
+      && !this->element_type_->channel_type()->may_send())
+    {
+      ret->push_back('(');
+      need_paren = true;
+    }
+
   this->append_reflection(this->element_type_, gogo, ret);
+
+  if (need_paren)
+    ret->push_back(')');
 }
 
 // Export.