diff --git a/Library/OSRM.h b/Library/OSRM.h
index ce12186ae..63a0672bb 100644
--- a/Library/OSRM.h
+++ b/Library/OSRM.h
@@ -54,12 +54,17 @@ class OSRM : boost::noncopyable {
     typedef boost::unordered_map<std::string, BasePlugin *> PluginMap;
     QueryObjectsStorage * objects;
 public:
-    OSRM(boost::unordered_map<const std::string,boost::filesystem::path>& paths);
+    OSRM(
+        boost::unordered_map<const std::string,
+        boost::filesystem::path>& paths,
+        const bool use_shared_memory = false
+    );
     ~OSRM();
     void RunQuery(RouteParameters & route_parameters, http::Reply & reply);
 private:
     void RegisterPlugin(BasePlugin * plugin);
     PluginMap pluginMap;
+    const bool use_shared_memory;
 };
 
 #endif //OSRM_H