diff --git a/doc/src/examples/algorithms/is_simple.cpp b/doc/src/examples/algorithms/is_simple.cpp
index 8aa8ad722..8255b5f1a 100644
--- a/doc/src/examples/algorithms/is_simple.cpp
+++ b/doc/src/examples/algorithms/is_simple.cpp
@@ -17,8 +17,6 @@
 #include <boost/geometry/geometries/point_xy.hpp>
 #include <boost/geometry/geometries/linestring.hpp>
 #include <boost/geometry/geometries/multi_linestring.hpp>
-
-#include <boost/geometry/io/wkt/wkt.hpp>
 /*<-*/ #include "create_svg_one.hpp" /*->*/
 
 int main()