diff --git a/include/engine/geospatial_query.hpp b/include/engine/geospatial_query.hpp
index 2fce9c0c9..c4efbcbbb 100644
--- a/include/engine/geospatial_query.hpp
+++ b/include/engine/geospatial_query.hpp
@@ -12,6 +12,8 @@
 
 #include "osrm/coordinate.hpp"
 
+#include <boost/optional.hpp>
+
 #include <algorithm>
 #include <cmath>
 #include <iterator>