diff --git a/Include/osrm/Reply.h b/Include/osrm/Reply.h
index 82f2d2f41..df199a2d3 100644
--- a/Include/osrm/Reply.h
+++ b/Include/osrm/Reply.h
@@ -64,7 +64,7 @@ public:
 
     Reply();
 private:
-    static std::string ToString(Reply::status_type status);
+    std::string ToString(Reply::status_type status);
     boost::asio::const_buffer ToBuffer(Reply::status_type status);
 };