Index: uspace/lib/cpp/include/internal/rbtree.hpp
===================================================================
--- uspace/lib/cpp/include/internal/rbtree.hpp	(revision adb7dfe14b1e52d137819547acc03d9b6471e731)
+++ uspace/lib/cpp/include/internal/rbtree.hpp	(revision 2fe861d024d7b2f951a1fe5b8d9ca9cb5333dd74)
@@ -313,5 +313,5 @@
             }
 
-            node_type* find_parent_for_insertion(const value_type& val) const
+            node_type* find_parent_for_insertion(const key_type& key) const
             {
                 auto current = root_;
@@ -321,5 +321,5 @@
                 {
                     parent = current;
-                    if (key_compare_(key_extractor_(val), key_extractor_(current->value)))
+                    if (key_compare_(key, key_extractor_(current->value)))
                         current = current->left;
                     else