diff --git a/src/engine/api/json_factory.cpp b/src/engine/api/json_factory.cpp
index 815d40648..c7a50362f 100644
--- a/src/engine/api/json_factory.cpp
+++ b/src/engine/api/json_factory.cpp
@@ -10,10 +10,12 @@
 
 #include <boost/assert.hpp>
 #include <boost/range/irange.hpp>
+#include <boost/optional.hpp>
 
 #include <string>
 #include <utility>
 #include <algorithm>
+#include <iterator>
 #include <vector>
 
 namespace osrm