diff -up kio-5.98.0/src/kioworkers/help/kio_help.cpp.orig kio-5.98.0/src/kioworkers/help/kio_help.cpp
--- kio-5.98.0/src/kioworkers/help/kio_help.cpp.orig
+++ kio-5.98.0/src/kioworkers/help/kio_help.cpp
@@ -35,7 +35,9 @@
     QStringList search;
 
     // assemble the local search paths
-    const QStringList localDoc = KDocTools::documentationDirs();
+    QStringList localDoc = KDocTools::documentationDirs();
+    QStringList fallbacklocalDoc = QStandardPaths::locateAll(QStandardPaths::GenericDataLocation, QStringLiteral("doc/kde/HTML"), QStandardPaths::LocateDirectory);
+    localDoc.append(fallbacklocalDoc);
 
     QStringList langs = KLocalizedString::languages();
     langs.append(QStringLiteral("en"));