diff --git a/src/applications/ponder/controller/PonderAnswerHistoryController.php b/src/applications/ponder/controller/PonderAnswerHistoryController.php
--- a/src/applications/ponder/controller/PonderAnswerHistoryController.php
+++ b/src/applications/ponder/controller/PonderAnswerHistoryController.php
@@ -2,6 +2,10 @@
 
 final class PonderAnswerHistoryController extends PonderController {
 
+  public function shouldAllowPublic() {
+    return true;
+  }
+
   public function handleRequest(AphrontRequest $request) {
     $viewer = $request->getViewer();
     $id = $request->getURIData('id');
diff --git a/src/applications/ponder/controller/PonderQuestionHistoryController.php b/src/applications/ponder/controller/PonderQuestionHistoryController.php
--- a/src/applications/ponder/controller/PonderQuestionHistoryController.php
+++ b/src/applications/ponder/controller/PonderQuestionHistoryController.php
@@ -2,6 +2,10 @@
 
 final class PonderQuestionHistoryController extends PonderController {
 
+  public function shouldAllowPublic() {
+    return true;
+  }
+
   public function handleRequest(AphrontRequest $request) {
     $viewer = $request->getViewer();
     $id = $request->getURIData('id');
diff --git a/src/applications/ponder/controller/PonderQuestionViewController.php b/src/applications/ponder/controller/PonderQuestionViewController.php
--- a/src/applications/ponder/controller/PonderQuestionViewController.php
+++ b/src/applications/ponder/controller/PonderQuestionViewController.php
@@ -2,6 +2,10 @@
 
 final class PonderQuestionViewController extends PonderController {
 
+  public function shouldAllowPublic() {
+    return true;
+  }
+
   public function handleRequest(AphrontRequest $request) {
     $viewer = $request->getViewer();
     $id = $request->getURIData('id');