diff --git a/include/boost/geometry/geometries/adapted/boost_polygon/ring_proxy.hpp b/include/boost/geometry/geometries/adapted/boost_polygon/ring_proxy.hpp
index 1616369..ace2473 100644
--- a/include/boost/geometry/geometries/adapted/boost_polygon/ring_proxy.hpp
+++ b/include/boost/geometry/geometries/adapted/boost_polygon/ring_proxy.hpp
@@ -55,7 +55,7 @@ template <>
 struct modify<false>
 {
     template <typename Ring, typename Point>
-    static inline void push_back(Ring& ring, Point const& point)
+    static inline void push_back(Ring& , Point const& )
     {
     }