diff --git a/core/src/Revolution/Processors/Context/Create.php b/core/src/Revolution/Processors/Context/Create.php
index e117dc9af81..a368d0df17f 100644
--- a/core/src/Revolution/Processors/Context/Create.php
+++ b/core/src/Revolution/Processors/Context/Create.php
@@ -40,7 +40,7 @@ public function beforeSave()
             case empty($key):
                 $this->addFieldError('key', $this->modx->lexicon('context_err_ns_key'));
                 break;
-            case in_array($key, $this->classKey::RESERVED_KEYS):
+            case in_array(strtolower($key), $this->classKey::RESERVED_KEYS):
                 $this->addFieldError('key', $this->modx->lexicon('context_err_reserved'));
                 break;
             case $this->alreadyExists($key):