diff --git a/docs/book/09-Polymorphism.md b/docs/book/09-Polymorphism.md
index 4f56929..a6093b4 100644
--- a/docs/book/09-Polymorphism.md
+++ b/docs/book/09-Polymorphism.md
@@ -819,7 +819,7 @@ class Amphibian extends Animal {
 }
 
 public class Frog extends Amphibian {
-    private Characteristic = = new Characteristic("Croaks");
+    private Characteristic p = new Characteristic("Croaks");
     private Description t = new Description("Eats Bugs");
     
     public Frog() {