diff --git a/chp00_introduction/NOC_I_05_NoiseWalk/sketch.js b/chp00_introduction/NOC_I_05_NoiseWalk/sketch.js
index f5853f1..1ea1340 100644
--- a/chp00_introduction/NOC_I_05_NoiseWalk/sketch.js
+++ b/chp00_introduction/NOC_I_05_NoiseWalk/sketch.js
@@ -11,7 +11,7 @@ function setup() {
 }
 
 function draw() {
-  walker.step();
+  walker.walk();
   walker.display();
 }