diff --git a/doc/src/examples/algorithms/num_geometries.cpp b/doc/src/examples/algorithms/num_geometries.cpp
index 92f9ac0a4..1279de951 100644
--- a/doc/src/examples/algorithms/num_geometries.cpp
+++ b/doc/src/examples/algorithms/num_geometries.cpp
@@ -17,6 +17,7 @@
 #include <boost/geometry/geometries/polygon.hpp>
 #include <boost/geometry/multi/geometries/multi_polygon.hpp>
 #include <boost/geometry/io/wkt/wkt.hpp>
+#include <boost/geometry/multi/io/wkt/wkt.hpp>
 
 
 int main()
diff --git a/doc/src/examples/algorithms/num_interior_rings.cpp b/doc/src/examples/algorithms/num_interior_rings.cpp
index 605ff2a62..f4e3654e9 100644
--- a/doc/src/examples/algorithms/num_interior_rings.cpp
+++ b/doc/src/examples/algorithms/num_interior_rings.cpp
@@ -17,6 +17,7 @@
 #include <boost/geometry/geometries/polygon.hpp>
 #include <boost/geometry/multi/geometries/multi_polygon.hpp>
 #include <boost/geometry/io/wkt/wkt.hpp>
+#include <boost/geometry/multi/io/wkt/wkt.hpp>
 
 
 int main()
diff --git a/doc/src/examples/algorithms/num_points.cpp b/doc/src/examples/algorithms/num_points.cpp
index 1ee857b0d..00789bfc8 100644
--- a/doc/src/examples/algorithms/num_points.cpp
+++ b/doc/src/examples/algorithms/num_points.cpp
@@ -18,6 +18,7 @@
 #include <boost/geometry/geometries/polygon.hpp>
 #include <boost/geometry/multi/geometries/multi_polygon.hpp>
 #include <boost/geometry/io/wkt/wkt.hpp>
+#include <boost/geometry/multi/io/wkt/wkt.hpp>
 
 
 int main()