diff --git a/include/interval-tree/tree_hooks.hpp b/include/interval-tree/tree_hooks.hpp
index 99da2db..f488650 100644
--- a/include/interval-tree/tree_hooks.hpp
+++ b/include/interval-tree/tree_hooks.hpp
@@ -14,79 +14,73 @@ namespace lib_interval_tree
             using hook_state = no_hook_state;
 
             template <typename tree_type>
-            static inline void on_destroy(tree_type& tree) noexcept
+            static inline void on_destroy(tree_type&) noexcept
             {}
 
             template <typename tree_type>
-            static inline void on_after_insert(tree_type& tree, typename tree_type::node_type* node) noexcept
+            static inline void on_after_insert(tree_type&, typename tree_type::node_type*) noexcept
             {}
 
             template <typename tree_type>
-            static inline void on_before_insert_fixup(tree_type& tree, typename tree_type::node_type* node) noexcept
+            static inline void on_before_insert_fixup(tree_type&, typename tree_type::node_type*) noexcept
             {}
 
             template <typename tree_type>
-            static inline void on_after_insert_fixup(tree_type& tree, typename tree_type::node_type* node) noexcept
+            static inline void on_after_insert_fixup(tree_type&, typename tree_type::node_type*) noexcept
             {}
 
             template <typename tree_type>
             static inline void on_before_erase_fixup(
-                tree_type& tree,
-                typename tree_type::node_type* node,
-                typename tree_type::node_type* node_parent,
-                bool other_is_left_child
+                tree_type&,
+                typename tree_type::node_type*,
+                typename tree_type::node_type*,
+                bool /*other_is_left_child*/
             ) noexcept
             {}
 
             template <typename tree_type>
             static inline void on_after_erase_fixup(
-                tree_type& tree,
-                typename tree_type::node_type* node,
-                typename tree_type::node_type* node_parent,
-                bool other_is_left_child
+                tree_type&,
+                typename tree_type::node_type*,
+                typename tree_type::node_type*,
+                bool /*other_is_left_child*/
             ) noexcept
             {}
 
             template <typename tree_type>
-            static inline void on_before_recalculate_max(tree_type& tree, typename tree_type::node_type* node) noexcept
+            static inline void on_before_recalculate_max(tree_type&, typename tree_type::node_type*) noexcept
             {}
 
             template <typename tree_type>
-            static inline void on_after_recalculate_max(tree_type& tree, typename tree_type::node_type* node) noexcept
+            static inline void on_after_recalculate_max(tree_type&, typename tree_type::node_type*) noexcept
             {}
 
             template <typename tree_type, typename compare_function_type>
             static inline void on_find(
-                tree_type const& tree,
-                typename tree_type::node_type* node,
-                typename tree_type::interval_type const& ival,
-                compare_function_type compare
+                tree_type const&,
+                typename tree_type::node_type*,
+                typename tree_type::interval_type const&,
+                compare_function_type
             ) noexcept
             {}
 
             template <typename tree_type, typename compare_function_type>
             static inline void on_find_all(
-                tree_type const& tree,
-                typename tree_type::node_type* node,
-                typename tree_type::interval_type const& ival,
-                compare_function_type compare
+                tree_type const&,
+                typename tree_type::node_type*,
+                typename tree_type::interval_type const&,
+                compare_function_type
             ) noexcept
             {}
 
             template <typename tree_type>
-            static inline void on_overlap_find(
-                tree_type const& tree,
-                typename tree_type::node_type* node,
-                typename tree_type::interval_type const& ival
-            ) noexcept
+            static inline void
+            on_overlap_find(tree_type const&, typename tree_type::node_type*, typename tree_type::interval_type const&) noexcept
             {}
 
             template <typename tree_type>
-            static inline void on_overlap_find_all(
-                tree_type const& tree,
-                typename tree_type::node_type* node,
-                typename tree_type::interval_type const& ival
-            ) noexcept
+            static inline void
+            on_overlap_find_all(tree_type const&, typename tree_type::node_type*, typename tree_type::interval_type const&) noexcept
             {}
         };
     }