diff --git a/chapter3/chapter3.erl b/chapter3/chapter3.erl
index 05b032f..0fb2e16 100755
--- a/chapter3/chapter3.erl
+++ b/chapter3/chapter3.erl
@@ -161,7 +161,7 @@ sum([Head | Tail]) -> Head + sum(Tail).
 len([]) -> 0;
 len([_ | Tail]) -> 1 + len(Tail).
 
-% Is the first argument a memeer of the second argument (a list)?
+% Is the first argument a member of the second argument (a list)?
 
 member(_, [])      -> false;
 member(H, [H | _]) -> true;