diff --git a/graphs_trees/check_balance/check_balance_solution.ipynb b/graphs_trees/check_balance/check_balance_solution.ipynb
index 5c91c88..af986fc 100644
--- a/graphs_trees/check_balance/check_balance_solution.ipynb
+++ b/graphs_trees/check_balance/check_balance_solution.ipynb
@@ -67,7 +67,7 @@
     "    \n",
     "Complexity:\n",
     "* Time: O(n)\n",
-    "* Space: O(log n)"
+    "* Space: O(h), where h is the height of the tree"
    ]
   },
   {