diff --git a/example/with_external_libs/x06_qt_world_mapper.cpp b/example/with_external_libs/x06_qt_world_mapper.cpp
index 00854c948..7b26a398b 100644
--- a/example/with_external_libs/x06_qt_world_mapper.cpp
+++ b/example/with_external_libs/x06_qt_world_mapper.cpp
@@ -32,8 +32,6 @@
 #include <boost/geometry/extensions/gis/io/wkt/wkt.hpp>
 
 
-#include "qt_mapper.hpp"
-
 
 // Adapt a QPointF such that it can be handled by Boost.Geometry
 BOOST_GEOMETRY_REGISTER_POINT_2D_GET_SET(QPointF, double, cs::cartesian, x, y, setX, setY)
@@ -53,7 +51,7 @@ typedef boost::geometry::model::multi_polygon
 class WorldMapper : public QWidget
 {
  public:
-    WorldMapper(std::vector<country_type> const& countries, boost::geometry::model::box<point_2d> const& box, QWidget *parent = 0)
+    WorldMapper(std::vector<country_type> const& countries, boost::geometry::model::box<point_2d> const& box)
         : m_countries(countries)
         , m_box(box)
     {
@@ -62,7 +60,7 @@ class WorldMapper : public QWidget
     }
 
  protected:
-    void paintEvent(QPaintEvent *event)
+    void paintEvent(QPaintEvent*)
     {
         map_transformer_type transformer(m_box, this->width(), this->height());
 
diff --git a/example/with_external_libs/x06_qt_world_mapper_readme.txt b/example/with_external_libs/x06_qt_world_mapper_readme.txt
index a40650a55..8c67025e2 100644
--- a/example/with_external_libs/x06_qt_world_mapper_readme.txt
+++ b/example/with_external_libs/x06_qt_world_mapper_readme.txt
@@ -5,13 +5,10 @@
 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
 // http://www.boost.org/LICENSE_1_0.txt)
 
-
-
 Qt World Mapper example
 
 It will show a basic Qt Widget, displaying world countries
 
-
 To compile this program:
 
 Install Qt (if not done before)
@@ -25,4 +22,10 @@ Using MSVC:
    - alternatively you can include Boost and/or Qt in your standard include path
    
 Using Linux/gcc
-   
+   - install Qt with sudo apt-get install libqt4-dev
+   - run qmake -project
+   - edit the generated file "with_external_libs.pro"  and delete all lines but the x06_qt_world_mapper.cpp
+   - run qmake
+   - edit the generated Makefile, if necessary, and add -I../../../.. to include Boost and Boost.Geometry
+   - run make
+