diff --git a/programs/mutant-3/swen90006/passbook/PassBook.java b/programs/mutant-3/swen90006/passbook/PassBook.java
index 7c8c94a5b243f451fc05f9bf3ed4cbebbce8ec90..d6ce3a9753f4bd86a0f8113101c5ac269f76cda2 100644
--- a/programs/mutant-3/swen90006/passbook/PassBook.java
+++ b/programs/mutant-3/swen90006/passbook/PassBook.java
@@ -91,7 +91,7 @@ public class PassBook
 	    boolean containsLowerCase = false;
 	    boolean containsUpperCase = false;
 	    boolean containsNumber = false;
-	    for (int i = 0; i < =passphrase.length(); i++) {
+	    for (int i = 0; i < passphrase.length(); i++) {
 
 		if ('a' <= passphrase.charAt(i) && passphrase.charAt(i) <= 'z') {
 		    containsLowerCase = true;