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diff --git a/src/live_effects/lpe-skeleton.h b/src/live_effects/lpe-skeleton.h
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * @brief Minimal LPE effect, see lpe-skeleton.cpp.
+ */
+/* Authors:
+ *   Johan Engelen <j.b.c.engelen@alumnus.utwente.nl>
+ *
+ * Copyright (C) 2007-2012 Authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifndef INKSCAPE_LPE_SKELETON_H
+#define INKSCAPE_LPE_SKELETON_H
+
+#include "live_effects/effect.h"
+#include "live_effects/parameter/parameter.h"
+
+namespace Inkscape {
+namespace LivePathEffect {
+
+// each knotholder handle for your LPE requires a separate class derived from LPEKnotHolderEntity;
+// define it in lpe-skeleton.cpp and add code to create it in addKnotHolderEntities
+// note that the LPE parameter classes implement their own handles! So in most cases, you will
+// not have to do anything like this.
+/**
+namespace Skeleton {
+  // we need a separate namespace to avoid clashes with other LPEs
+  class KnotHolderEntityMyHandle;
+}
+**/
+
+class LPESkeleton : public Effect {
+public:
+    LPESkeleton(LivePathEffectObject *lpeobject);
+    ~LPESkeleton() override;
+
+//  Choose to implement one of the doEffect functions. You can delete or comment out the others.
+//    virtual void doEffect (SPCurve * curve);
+//    virtual Geom::PathVector doEffect_path (Geom::PathVector const &path_in);
+    Geom::Piecewise<Geom::D2<Geom::SBasis> > doEffect_pwd2 (Geom::Piecewise<Geom::D2<Geom::SBasis> > const &pwd2_in) override;
+
+    /* the knotholder entity classes (if any) can be declared friends */
+    //friend class Skeleton::KnotHolderEntityMyHandle;
+    //virtual void addKnotHolderEntities(KnotHolder *knotholder, SPItem *item);
+
+private:
+    // add the parameters for your effect here:
+    ScalarParam number;
+    // there are all kinds of parameters. Check the /live_effects/parameter directory which types exist!
+
+    LPESkeleton(const LPESkeleton&) = delete;
+    LPESkeleton& operator=(const LPESkeleton&) = delete;
+};
+
+} //namespace LivePathEffect
+} //namespace Inkscape
+
+#endif
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :