diff --git a/doc/src/examples/algorithms/expand.cpp b/doc/src/examples/algorithms/expand.cpp
index 1a628e771..cba03b247 100644
--- a/doc/src/examples/algorithms/expand.cpp
+++ b/doc/src/examples/algorithms/expand.cpp
@@ -14,6 +14,8 @@
 #include <list>
 
 #include <boost/geometry.hpp>
+#include <boost/geometry/geometries/box.hpp>
+#include <boost/geometry/geometries/point_xy.hpp>
 
 int main()
 {