diff --git a/src/Plugin/CKEditorPlugin/MathJaxPlugin.php b/src/Plugin/CKEditorPlugin/MathJaxPlugin.php
index 5e353a6..6046c71 100644
--- a/src/Plugin/CKEditorPlugin/MathJaxPlugin.php
+++ b/src/Plugin/CKEditorPlugin/MathJaxPlugin.php
@@ -75,7 +75,7 @@ class MathJaxPlugin extends CKEditorPluginBase implements CKEditorPluginConfigur
    */
   public function getButtons() {
     return array(
-      'mathjax' => array(
+      'Mathjax' => array(
         'label' => t('Math'),
         'image' => base_path() . 'libraries/mathjax/icons/mathjax.png',
       ),