diff --git a/plugin/client_rpc.go b/plugin/client_rpc.go
index 5446b40425..e8115d70e5 100644
--- a/plugin/client_rpc.go
+++ b/plugin/client_rpc.go
@@ -168,6 +168,7 @@ func init() {
 	gob.Register(&model.AutocompleteDynamicListArg{})
 	gob.Register(&model.AutocompleteStaticListArg{})
 	gob.Register(&model.AutocompleteTextArg{})
+	gob.Register(&model.PreviewPost{})
 }
 
 // These enforce compile time checks to make sure types implement the interface