diff --git a/text.py b/text.py
index 4ca69fd..05b8f09 100644
--- a/text.py
+++ b/text.py
@@ -132,7 +132,7 @@ def find_nth_occurrence(string: str, substring: str, n: int):
         else:
             rep = "b" * len(substring)
 
-    return string.replace(substring, rep, n - 1).find(substring)
+    return string.replace(substring, rep, n).find(substring)
 
 
 if __name__ == "__main__":