diff --git a/programs/mutant-5/swen90006/passbook/PassBook.java b/programs/mutant-5/swen90006/passbook/PassBook.java
index 94e2dfdcd19284dafa914ed1214ff926ea3318da..d2f10eea19af458cad205241b51f36a5ff548589 100644
--- a/programs/mutant-5/swen90006/passbook/PassBook.java
+++ b/programs/mutant-5/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;