diff --git a/webenginepart/src/webenginepart.cpp b/webenginepart/src/webenginepart.cpp
--- a/webenginepart/src/webenginepart.cpp
+++ b/webenginepart/src/webenginepart.cpp
@@ -390,7 +390,8 @@
      if (KProtocolManager::defaultMimetype(url) == "text/html") { // man:, info:, etc.
         QWebEngineProfile *prof = QWebEngineProfile::defaultProfile();
         QByteArray scheme = url.scheme().toUtf8();
-        if (!prof->urlSchemeHandler(scheme)) {
+        //Qt complains about installing a scheme handler overriding the internal "about" scheme
+        if (scheme != "about" && !prof->urlSchemeHandler(scheme)) {
             prof->installUrlSchemeHandler(scheme, new WebEnginePartKIOHandler(prof));
         }
     }