diff --git a/src/js/easymde.js b/src/js/easymde.js
index ce280b6..bd11f8b 100644
--- a/src/js/easymde.js
+++ b/src/js/easymde.js
@@ -238,6 +238,7 @@ function createToolbarButton(options, enableActions, enableTooltips, shortcuts,
         }
     }
 
+    el.className = 'mde-' + options.name;
     el.setAttribute('type', markup);
     enableTooltips = (enableTooltips == undefined) ? true : enableTooltips;