--- a/src/xslt.cpp

+++ b/src/xslt.cpp

@@ -482,5 +482,10 @@ QStringList getKDocToolsCatalogs()

 QStringList KDocTools::documentationDirs()

 {

     /* List of paths containing documentation */

-    return QStandardPaths::locateAll(QStandardPaths::GenericDataLocation, QStringLiteral("doc/HTML"), QStandardPaths::LocateDirectory);

+    QStringList doc_dirs(QStandardPaths::locateAll(QStandardPaths::GenericDataLocation, QStringLiteral("doc/HTML"), QStandardPaths::LocateDirectory));

+    if( !doc_dirs.contains(QStringLiteral("/usr/share/kf5/doc/HTML")) )

+        doc_dirs.append("/usr/share/kf5/doc/HTML");

+    if( !doc_dirs.contains(QStringLiteral("/usr/share/kde4/doc/HTML")) )

+        doc_dirs.append("/usr/share/kde4/doc/HTML");

+    return doc_dirs;

 }