diff --git a/Polyline_simplification_2/examples/Polyline_simplification_2/simplify.cpp b/Polyline_simplification_2/examples/Polyline_simplification_2/simplify.cpp
index e6b98a4951d..ce4d6d36e7f 100644
--- a/Polyline_simplification_2/examples/Polyline_simplification_2/simplify.cpp
+++ b/Polyline_simplification_2/examples/Polyline_simplification_2/simplify.cpp
@@ -27,9 +27,10 @@ typedef CT::Vertices_in_constraint_iterator Vertices_in_constraint_iterator;
 typedef CT::Points_in_constraint_iterator   Points_in_constraint_iterator;
 typedef PS::Stop_below_count_ratio_threshold Stop;
 typedef PS::Squared_distance_cost Cost;
-
+#endif
 int main(int argc, char* argv[])
 {
+  #if BOOST_VERSION >= 105600
   std::ifstream ifs( (argc==1)?"data/polygon.wkt":argv[1]);
   CT ct;
   Polygon_with_holes_2 P;
@@ -53,8 +54,8 @@ int main(int argc, char* argv[])
         ++vit)
       std::cout << *vit << std::endl;
   }
+#endif
   return 0;
 }
-#endif
 
 
diff --git a/Polyline_simplification_2/examples/Polyline_simplification_2/simplify_polygon.cpp b/Polyline_simplification_2/examples/Polyline_simplification_2/simplify_polygon.cpp
index b9ace85ad20..3907cfd4617 100644
--- a/Polyline_simplification_2/examples/Polyline_simplification_2/simplify_polygon.cpp
+++ b/Polyline_simplification_2/examples/Polyline_simplification_2/simplify_polygon.cpp
@@ -14,9 +14,10 @@ typedef CGAL::Polygon_2<K>                   Polygon_2;
 typedef CGAL::Polygon_with_holes_2<K>        Polygon_with_holes_2;
 typedef PS::Stop_below_count_ratio_threshold Stop;
 typedef PS::Squared_distance_cost            Cost;
-
+#endif
 int main(int argc, char* argv[])
 {
+  #if BOOST_VERSION >= 105600
   std::ifstream ifs( (argc==1)?"data/polygon.wkt":argv[1]);
   Polygon_with_holes_2 polygon;
   CGAL::read_polygon_WKT(ifs, polygon);
@@ -26,8 +27,6 @@ int main(int argc, char* argv[])
   std::cout.precision(12);
   CGAL::write_polygon_WKT(std::cout, polygon) << std::endl;
 
+#endif
   return 0;
 }
-#endif
-
-
diff --git a/Polyline_simplification_2/examples/Polyline_simplification_2/simplify_polyline.cpp b/Polyline_simplification_2/examples/Polyline_simplification_2/simplify_polyline.cpp
index f1bf0552e5b..a3ab61ffe25 100644
--- a/Polyline_simplification_2/examples/Polyline_simplification_2/simplify_polyline.cpp
+++ b/Polyline_simplification_2/examples/Polyline_simplification_2/simplify_polyline.cpp
@@ -14,9 +14,10 @@ typedef K::Point_2 Point_2;
 typedef std::deque<Point_2> Polyline_2;
 typedef PS::Stop_above_cost_threshold Stop;
 typedef PS::Squared_distance_cost Cost;
-
+#endif
 int main(int argc, char* argv[])
 {
+  #if BOOST_VERSION >= 105600
   Polyline_2 polyline;
   std::ifstream ifs( (argc==1)?"data/polyline.wkt":argv[1]);
   CGAL::read_linestring_WKT(ifs, polyline);
@@ -28,6 +29,6 @@ int main(int argc, char* argv[])
   for(std::size_t i=0; i < result.size(); ++i){
     std::cout << result[i] << std::endl;
   }
+#endif
   return 0;
 }
-#endif
diff --git a/Stream_support/examples/Stream_support/Linestring_WKT.cpp b/Stream_support/examples/Stream_support/Linestring_WKT.cpp
index eadfb2074b1..814b566c845 100644
--- a/Stream_support/examples/Stream_support/Linestring_WKT.cpp
+++ b/Stream_support/examples/Stream_support/Linestring_WKT.cpp
@@ -38,6 +38,11 @@ int main(int argc, char* argv[])
     BOOST_FOREACH(const Point& p, l)
         std::cout<<p<<std::endl;
   }
-  
+  return 0;
+}
+#else
+int main()
+{
+  return 0;
 }
 #endif
diff --git a/Stream_support/examples/Stream_support/Point_WKT.cpp b/Stream_support/examples/Stream_support/Point_WKT.cpp
index 7c97f211bac..4d62d4c8285 100644
--- a/Stream_support/examples/Stream_support/Point_WKT.cpp
+++ b/Stream_support/examples/Stream_support/Point_WKT.cpp
@@ -29,5 +29,11 @@ int main(int argc, char* argv[])
     std::cout<<p<<std::endl;
   }
   is.close();
+  return 0;
+}
+#else
+int main()
+{
+  return 0;
 }
 #endif
diff --git a/Stream_support/examples/Stream_support/Polygon_WKT.cpp b/Stream_support/examples/Stream_support/Polygon_WKT.cpp
index c415b26d9ce..5f800ec36cb 100644
--- a/Stream_support/examples/Stream_support/Polygon_WKT.cpp
+++ b/Stream_support/examples/Stream_support/Polygon_WKT.cpp
@@ -45,4 +45,9 @@ int main(int argc, char* argv[])
   }
   return 0;
 }
+#else
+int main()
+{
+  return 0;
+}
 #endif
diff --git a/Stream_support/examples/Stream_support/read_WKT.cpp b/Stream_support/examples/Stream_support/read_WKT.cpp
index cf619ca789c..9214b4eb041 100644
--- a/Stream_support/examples/Stream_support/read_WKT.cpp
+++ b/Stream_support/examples/Stream_support/read_WKT.cpp
@@ -43,4 +43,9 @@ int main(int argc, char* argv[])
   }
   return 0;
 }
+#else
+int main()
+{
+  return 0;
+}
 #endif
diff --git a/Stream_support/test/Stream_support/test_read_WKT.cpp b/Stream_support/test/Stream_support/test_read_WKT.cpp
index 5d5e6a615c6..7b1a734058f 100644
--- a/Stream_support/test/Stream_support/test_read_WKT.cpp
+++ b/Stream_support/test/Stream_support/test_read_WKT.cpp
@@ -67,5 +67,9 @@ int main()
   std::cout<<"WKT reading test passed."<<std::endl;
   return 0;
 }
-
+#else
+int main()
+{
+  return 0;
+}
 #endif
diff --git a/Stream_support/test/Stream_support/test_write_WKT.cpp b/Stream_support/test/Stream_support/test_write_WKT.cpp
index 8a142f4e918..f23cb88e15b 100644
--- a/Stream_support/test/Stream_support/test_write_WKT.cpp
+++ b/Stream_support/test/Stream_support/test_write_WKT.cpp
@@ -202,4 +202,9 @@ int main()
   std::cout<<"WKT writing test passed."<<std::endl;
   return 0;
 }
+#else
+int main()
+{
+  return 0;
+}
 #endif