diff --git a/reference/mongo/mongodb/execute.xml b/reference/mongo/mongodb/execute.xml
index 67f38c27ca..a12088068e 100644
--- a/reference/mongo/mongodb/execute.xml
+++ b/reference/mongo/mongodb/execute.xml
@@ -31,7 +31,7 @@
 <?php
 
 public function execute($code, $args) {
-    return $this->command(array('$eval' => $code, args => $args));
+    return $this->command(array('$eval' => $code, 'args' => $args));
 }
 
 ?>