diff --git a/source/simple/geom.hpp b/source/simple/geom.hpp
index 3ceb7f0cae1cdfa8ff70600ea04b27b36a89e0c3..44c9ae8b7abad0e4fa5c2df7d11a120dbd58d608 100644
--- a/source/simple/geom.hpp
+++ b/source/simple/geom.hpp
@@ -1,6 +1,7 @@
 #include "geom/algorithm.h"
 #include "geom/algorithm.hpp"
 #include "geom/bool_algebra.hpp"
+#include "geom/iterator.hpp"
 #include "geom/reduction.hpp"
 #include "geom/segment.hpp"
 #include "geom/vector.hpp"