diff --git a/docs/tutorial_04_sequence_star.md b/docs/tutorial_04_sequence_star.md
index ec51e4414..6d478ac18 100644
--- a/docs/tutorial_04_sequence_star.md
+++ b/docs/tutorial_04_sequence_star.md
@@ -3,7 +3,7 @@
 The next example shows the difference between a `SequenceNode` and a 
 `ReactiveSequence`.
 
-An Asynchornous Action has it's own thread. This allows the user to 
+An Asynchronous Action has it's own thread. This allows the user to 
 use blocking functions but to return the flow of execution 
 to the tree.