diff --git a/trees/bt_is_same_trees.py b/trees/bt_is_same_trees.py
index cdaab4b..f814aa9 100644
--- a/trees/bt_is_same_trees.py
+++ b/trees/bt_is_same_trees.py
@@ -2,15 +2,13 @@
 # -*- coding: utf-8 -*-
 # author: bt3gl
 
+
 def is_same_trees(p, q):
 
         if not p and not q:
             return True
         
-        if (not p and q) or (not q and p):
-            return False
-        
-        if p.val != q.val:
+        if (not p and q) or (not q and p) or p.val != q.val:
             return False
         
         return self.is_same_trees(p.right, q.right) and self.is_same_trees(p.left, q.left)