diff --git a/strings/remove_duplicate.py b/strings/remove_duplicate.py
index 5ab0e9962752..7e58875b22c1 100644
--- a/strings/remove_duplicate.py
+++ b/strings/remove_duplicate.py
@@ -1,3 +1,5 @@
+from collections import OrderedDict
+
 def remove_duplicates(sentence: str) -> str:
     """
     Remove duplicates from sentence
@@ -6,7 +8,7 @@ def remove_duplicates(sentence: str) -> str:
     >>> remove_duplicates("Python   is      great and Java is also great")
     'Java Python also and great is'
     """
-    return " ".join(sorted(set(sentence.split())))
+    return " ".join(list(OrderedDict.fromkeys(sentence.split())))
 
 
 if __name__ == "__main__":