diff --git a/include/boost/geometry/algorithms/detail/partition.hpp b/include/boost/geometry/algorithms/detail/partition.hpp
index 3fbd98b77..59bdad706 100644
--- a/include/boost/geometry/algorithms/detail/partition.hpp
+++ b/include/boost/geometry/algorithms/detail/partition.hpp
@@ -10,6 +10,7 @@
 #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_PARTITION_HPP
 
 #include <vector>
+#include <boost/geometry/algorithms/assign.hpp>
 #include <boost/range/algorithm/copy.hpp>
 #include <boost/geometry/core/coordinate_type.hpp>
 
diff --git a/include/boost/geometry/algorithms/envelope.hpp b/include/boost/geometry/algorithms/envelope.hpp
index 370812f55..0964affd1 100644
--- a/include/boost/geometry/algorithms/envelope.hpp
+++ b/include/boost/geometry/algorithms/envelope.hpp
@@ -19,6 +19,7 @@
 
 #include <boost/numeric/conversion/cast.hpp>
 
+#include <boost/geometry/algorithms/assign.hpp>
 #include <boost/geometry/algorithms/expand.hpp>
 #include <boost/geometry/core/cs.hpp>
 #include <boost/geometry/core/exterior_ring.hpp>