diff --git a/bintree.c b/bintree.c
index 312e466..7e3eab7 100644
--- a/bintree.c
+++ b/bintree.c
@@ -72,10 +72,21 @@ void *nextTreeData(TreeNode *root)
 // Releases all memory resources (including data copies).
 void clearTree(TreeNode *root)
 {
-  
+    if (root == NULL)
+        return;
 
+    // Erst linken Knoten löschen
+    clearTree(root->left);
+
+    // Dann rechten Knoten löschen
+    clearTree(root->right);
+
+    // Dann eigenen Speicher freigeben
+    free(root->data);
+    free(root);
 }
 
+
 // Returns the number of entries in the tree given by root.
 unsigned int treeSize(const TreeNode *root)
 {