diff --git a/src/applications/celerity/CelerityStaticResourceResponse.php b/src/applications/celerity/CelerityStaticResourceResponse.php
index e710e5121d..0d4fafdfd7 100644
--- a/src/applications/celerity/CelerityStaticResourceResponse.php
+++ b/src/applications/celerity/CelerityStaticResourceResponse.php
@@ -40,7 +40,7 @@ final class CelerityStaticResourceResponse {
   public function initBehavior(
     $behavior,
     array $config = array(),
-    $source_name = 'phabricator') {
+    $source_name) {
 
     $this->requireResource('javelin-behavior-'.$behavior, $source_name);
 
diff --git a/src/infrastructure/javelin/Javelin.php b/src/infrastructure/javelin/Javelin.php
index 922cd45e83..0e8c86fc6b 100644
--- a/src/infrastructure/javelin/Javelin.php
+++ b/src/infrastructure/javelin/Javelin.php
@@ -2,9 +2,14 @@
 
 final class Javelin {
 
-  public static function initBehavior($behavior, array $config = array()) {
+  public static function initBehavior(
+    $behavior,
+    array $config = array(),
+    $source_name = 'phabricator') {
+
     $response = CelerityAPI::getStaticResourceResponse();
-    $response->initBehavior($behavior, $config);
+
+    $response->initBehavior($behavior, $config, $source_name);
   }
 
 }