diff --git a/searches/binary_search.py b/searches/binary_search.py
index 2e66b672d5b4..a88b6603d9be 100644
--- a/searches/binary_search.py
+++ b/searches/binary_search.py
@@ -45,7 +45,7 @@ def bisect_left(
     2
     """
     if hi < 0:
-        hi = len(sorted_collection)
+        hi = len(sorted_collection) + hi  # in case of usage of negative indexing for hi
 
     while lo < hi:
         mid = lo + (hi - lo) // 2
@@ -86,7 +86,7 @@ def bisect_right(
     2
     """
     if hi < 0:
-        hi = len(sorted_collection)
+        hi = len(sorted_collection) + hi  # in case of usage of negative indexing for hi
 
     while lo < hi:
         mid = lo + (hi - lo) // 2