diff --git a/qutebrowser/browser/webengine/webengineelem.py b/qutebrowser/browser/webengine/webengineelem.py
index 69de7c906..40de2498e 100644
--- a/qutebrowser/browser/webengine/webengineelem.py
+++ b/qutebrowser/browser/webengine/webengineelem.py
@@ -91,7 +91,7 @@ class WebEngineElement(webelem.AbstractWebElement):
 
         The returned name will always be lower-case.
         """
-        return self._js_dict['tag_name']
+        return self._js_dict['tag_name'].lower()
 
     def outer_xml(self):
         """Get the full HTML representation of this element."""