diff --git a/include/boost/geometry/algorithms/detail/is_valid/box.hpp b/include/boost/geometry/algorithms/detail/is_valid/box.hpp
index 270f55225..ad1a5d15f 100644
--- a/include/boost/geometry/algorithms/detail/is_valid/box.hpp
+++ b/include/boost/geometry/algorithms/detail/is_valid/box.hpp
@@ -46,7 +46,7 @@ struct has_valid_corners
 template <typename Box>
 struct has_valid_corners<Box, 0>
 {
-    static inline bool apply(Box const& /*box*/)
+    static inline bool apply(Box const&)
     {
         return true;
     }
diff --git a/include/boost/geometry/algorithms/detail/is_valid/debug_complement_graph.hpp b/include/boost/geometry/algorithms/detail/is_valid/debug_complement_graph.hpp
index a435370c8..83997a675 100644
--- a/include/boost/geometry/algorithms/detail/is_valid/debug_complement_graph.hpp
+++ b/include/boost/geometry/algorithms/detail/is_valid/debug_complement_graph.hpp
@@ -51,8 +51,8 @@ inline void debug_print_complement_graph(OutputStream& os,
 }
 #else
 template <typename OutputStream, typename Vertex>
-void debug_print_complement_graph(OutputStream& /*os*/,
-                                  complement_graph<Vertex> const& /*graph*/)
+void debug_print_complement_graph(OutputStream&,
+                                  complement_graph<Vertex> const&)
 {
 }
 #endif
diff --git a/include/boost/geometry/algorithms/detail/is_valid/debug_print_turns.hpp b/include/boost/geometry/algorithms/detail/is_valid/debug_print_turns.hpp
index eda20ef7b..b14355639 100644
--- a/include/boost/geometry/algorithms/detail/is_valid/debug_print_turns.hpp
+++ b/include/boost/geometry/algorithms/detail/is_valid/debug_print_turns.hpp
@@ -53,7 +53,7 @@ inline void debug_print_turns(TurnIterator first, TurnIterator beyond)
 }
 #else
 template <typename TurnIterator>
-inline void debug_print_turns(TurnIterator /*first*/, TurnIterator /*beyond*/)
+inline void debug_print_turns(TurnIterator, TurnIterator)
 {}
 #endif // BOOST_GEOMETRY_TEST_DEBUG