diff --git a/browser/components/translation/BergamotTranslator.jsm b/browser/components/translation/BergamotTranslator.jsm
index 89660466bc7b4..6c7fb6ee08b5c 100644
--- a/browser/components/translation/BergamotTranslator.jsm
+++ b/browser/components/translation/BergamotTranslator.jsm
@@ -192,6 +192,7 @@ this.BergamotTranslator.prototype = {
           let doc = new DOMParser().parseFromString(result, "text/html");
           result = doc.body.firstChild.nodeValue;
         }
+        root.isSimpleRoot = true;
         root.parseResult(result);
       } catch (e) {
         error = true;