diff --git a/include/edyn/constraints/contact_constraint.hpp b/include/edyn/constraints/contact_constraint.hpp
index 618b01e4..97a9bc08 100644
--- a/include/edyn/constraints/contact_constraint.hpp
+++ b/include/edyn/constraints/contact_constraint.hpp
@@ -1,6 +1,7 @@
 #ifndef EDYN_CONSTRAINTS_CONTACT_CONSTRAINT_HPP
 #define EDYN_CONSTRAINTS_CONTACT_CONSTRAINT_HPP
 
+#include <vector>
 #include <entt/entity/fwd.hpp>
 #include "edyn/math/constants.hpp"
 #include "edyn/constraints/constraint_base.hpp"