diff --git a/src/as/com/threerings/presents/client/ConfirmAdapter.as b/src/as/com/threerings/presents/client/ConfirmAdapter.as
index ccab1e6ea..6cc6e435c 100644
--- a/src/as/com/threerings/presents/client/ConfirmAdapter.as
+++ b/src/as/com/threerings/presents/client/ConfirmAdapter.as
@@ -24,8 +24,11 @@ package com.threerings.presents.client {
 public class ConfirmAdapter extends InvocationAdapter
     implements InvocationService_ConfirmListener
 {
-    public function ConfirmAdapter (
-        failed :Function, processed :Function = null)
+    /**
+     * Construct a confirm adapter.
+     * The processed function may be null.
+     */
+    public function ConfirmAdapter (processed :Function, failed :Function)
     {
         super(failed);
         _processed = processed;
diff --git a/src/as/com/threerings/presents/client/ResultAdapter.as b/src/as/com/threerings/presents/client/ResultAdapter.as
index 6af94c694..5a505e3c4 100644
--- a/src/as/com/threerings/presents/client/ResultAdapter.as
+++ b/src/as/com/threerings/presents/client/ResultAdapter.as
@@ -27,7 +27,7 @@ package com.threerings.presents.client {
 public class ResultAdapter extends InvocationAdapter
     implements InvocationService_ResultListener
 {
-    public function ResultAdapter (failed :Function, processed :Function)
+    public function ResultAdapter (processed :Function, failed :Function)
     {
         super(failed);
         _processed = processed;