diff --git a/strings/reverse_letters.py b/strings/reverse_letters.py
index 4f73f816b382..cd1b7832d066 100644
--- a/strings/reverse_letters.py
+++ b/strings/reverse_letters.py
@@ -1,7 +1,7 @@
 def reverse_letters(sentence: str, length: int = 0) -> str:
     """
     Reverse all words that are longer than the given length of characters in a sentence.
-    If unspecified, length is taken as 0
+    If ``length`` is not specified, it defaults to 0.
 
     >>> reverse_letters("Hey wollef sroirraw", 3)
     'Hey fellow warriors'
@@ -13,7 +13,7 @@ def reverse_letters(sentence: str, length: int = 0) -> str:
     'racecar'
     """
     return " ".join(
-        "".join(word[::-1]) if len(word) > length else word for word in sentence.split()
+        word[::-1] if len(word) > length else word for word in sentence.split()
     )