diff --git a/searches/binary_search.py b/searches/binary_search.py
index 93bf189cc08f..7df45883c09a 100644
--- a/searches/binary_search.py
+++ b/searches/binary_search.py
@@ -110,6 +110,9 @@ def binary_search_by_recursion(sorted_collection, item, left, right):
     >>> binary_search_std_lib([0, 5, 7, 10, 15], 6)
 
     """
+    if (right < left):
+        return None
+    
     midpoint = left + (right - left) // 2
 
     if sorted_collection[midpoint] == item: