diff --git a/plugin/specialchars/summernote-ext-specialchars.js b/plugin/specialchars/summernote-ext-specialchars.js
index 8ad6ad3da..2ee4e512e 100644
--- a/plugin/specialchars/summernote-ext-specialchars.js
+++ b/plugin/specialchars/summernote-ext-specialchars.js
@@ -64,7 +64,7 @@
         '♦'
       ];
 
-      context.memo('button.specialCharacter', function() {
+      context.memo('button.specialchars', function() {
         return ui.button({
           contents: '<i class="fa fa-font fa-flip-vertical">',
           tooltip: lang.specialChar.specialChar,