diff --git a/app/assets/javascripts/discourse/components/composer-editor.js.es6 b/app/assets/javascripts/discourse/components/composer-editor.js.es6
index 9aefd5feb5f..3d25c3a4f35 100644
--- a/app/assets/javascripts/discourse/components/composer-editor.js.es6
+++ b/app/assets/javascripts/discourse/components/composer-editor.js.es6
@@ -435,7 +435,7 @@ export default Ember.Component.extend({
       const { types } = clipboardData(e);
       this._pasted = true;
 
-      if (types.includes("text/plain")) {
+      if (types.includes("text/plain") || types.includes("text/html")) {
         e.preventDefault();
       }
     });