diff --git a/Algo/Courses/Chapter 6 - Lists (Exercises).md b/Algo/Courses/Chapter 6 - Lists (Exercises).md
index 0a11c7d..a1abccf 100644
--- a/Algo/Courses/Chapter 6 - Lists (Exercises).md	
+++ b/Algo/Courses/Chapter 6 - Lists (Exercises).md	
@@ -251,6 +251,6 @@ let assos k l =
 		invalid_arg "k not natural"
 	else 
 	match l with
-		|  -> failwith "not found"
+		| -> failwith "not found"
 		| (k,y)::t -> y
 		| _ -> assos k t