diff --git a/lib/elixir/lib/supervisor.ex b/lib/elixir/lib/supervisor.ex
index ba4a893d2d6..863fab99750 100644
--- a/lib/elixir/lib/supervisor.ex
+++ b/lib/elixir/lib/supervisor.ex
@@ -208,7 +208,7 @@ defmodule Supervisor do
   The map above defines a child with `:id` of `Counter` that is started
   by calling `Counter.start_link(0)`.
 
-  However, definining the child specification for each child as a map can be
+  However, defining the child specification for each child as a map can be
   quite error prone, as we may change the `Counter` implementation and forget
   to update its specification. That's why Elixir allows you to pass a tuple with
   the module name and the `start_link` argument instead of the specification:
diff --git a/lib/elixir/src/elixir_tokenizer.erl b/lib/elixir/src/elixir_tokenizer.erl
index f069c783a81..590547ea91b 100644
--- a/lib/elixir/src/elixir_tokenizer.erl
+++ b/lib/elixir/src/elixir_tokenizer.erl
@@ -1283,7 +1283,7 @@ tokenize_identifier(String, Line, Column, Scope, MaybeKeyword) ->
       empty
   end.
 
-%% hueristic: try nfkc; try confusability skeleton; try calling this again w/just failed codepoint
+%% heuristic: try nfkc; try confusability skeleton; try calling this again w/just failed codepoint
 suggest_simpler_unexpected_token_in_error(Wrong, Line, WrongColumn, Scope) ->
   NFKC = unicode:characters_to_nfkc_list(Wrong),
   case (Scope#elixir_tokenizer.identifier_tokenizer):tokenize(NFKC) of