diff --git a/programs/mutant-1/swen90006/passbook/PassBook.java b/programs/mutant-1/swen90006/passbook/PassBook.java
index e0f9024d3b95635c9428d5b80bc29ff5b86d7df5..94e2dfdcd19284dafa914ed1214ff926ea3318da 100644
--- a/programs/mutant-1/swen90006/passbook/PassBook.java
+++ b/programs/mutant-1/swen90006/passbook/PassBook.java
@@ -179,9 +179,9 @@ public class PassBook
     }
 
     /**
-     * Updates the logic details for a URL of a user. If the url
-     * username or password are null, the username/password details
-     * for this URL are removed.
+     * Updates the login details for a URL of a user. If the url
+     * username or password are null, the login details for this URL
+     * must be removed.
      *
      * @param sessionID    the session ID for the logged-in user
      * @param urlUsername  the username for the user to be added
diff --git a/programs/mutant-2/swen90006/passbook/PassBook.java b/programs/mutant-2/swen90006/passbook/PassBook.java
index e0f9024d3b95635c9428d5b80bc29ff5b86d7df5..94e2dfdcd19284dafa914ed1214ff926ea3318da 100644
--- a/programs/mutant-2/swen90006/passbook/PassBook.java
+++ b/programs/mutant-2/swen90006/passbook/PassBook.java
@@ -179,9 +179,9 @@ public class PassBook
     }
 
     /**
-     * Updates the logic details for a URL of a user. If the url
-     * username or password are null, the username/password details
-     * for this URL are removed.
+     * Updates the login details for a URL of a user. If the url
+     * username or password are null, the login details for this URL
+     * must be removed.
      *
      * @param sessionID    the session ID for the logged-in user
      * @param urlUsername  the username for the user to be added
diff --git a/programs/mutant-3/swen90006/passbook/PassBook.java b/programs/mutant-3/swen90006/passbook/PassBook.java
index e0f9024d3b95635c9428d5b80bc29ff5b86d7df5..94e2dfdcd19284dafa914ed1214ff926ea3318da 100644
--- a/programs/mutant-3/swen90006/passbook/PassBook.java
+++ b/programs/mutant-3/swen90006/passbook/PassBook.java
@@ -179,9 +179,9 @@ public class PassBook
     }
 
     /**
-     * Updates the logic details for a URL of a user. If the url
-     * username or password are null, the username/password details
-     * for this URL are removed.
+     * Updates the login details for a URL of a user. If the url
+     * username or password are null, the login details for this URL
+     * must be removed.
      *
      * @param sessionID    the session ID for the logged-in user
      * @param urlUsername  the username for the user to be added
diff --git a/programs/mutant-4/swen90006/passbook/PassBook.java b/programs/mutant-4/swen90006/passbook/PassBook.java
index e0f9024d3b95635c9428d5b80bc29ff5b86d7df5..94e2dfdcd19284dafa914ed1214ff926ea3318da 100644
--- a/programs/mutant-4/swen90006/passbook/PassBook.java
+++ b/programs/mutant-4/swen90006/passbook/PassBook.java
@@ -179,9 +179,9 @@ public class PassBook
     }
 
     /**
-     * Updates the logic details for a URL of a user. If the url
-     * username or password are null, the username/password details
-     * for this URL are removed.
+     * Updates the login details for a URL of a user. If the url
+     * username or password are null, the login details for this URL
+     * must be removed.
      *
      * @param sessionID    the session ID for the logged-in user
      * @param urlUsername  the username for the user to be added
diff --git a/programs/mutant-5/swen90006/passbook/PassBook.java b/programs/mutant-5/swen90006/passbook/PassBook.java
index e0f9024d3b95635c9428d5b80bc29ff5b86d7df5..94e2dfdcd19284dafa914ed1214ff926ea3318da 100644
--- a/programs/mutant-5/swen90006/passbook/PassBook.java
+++ b/programs/mutant-5/swen90006/passbook/PassBook.java
@@ -179,9 +179,9 @@ public class PassBook
     }
 
     /**
-     * Updates the logic details for a URL of a user. If the url
-     * username or password are null, the username/password details
-     * for this URL are removed.
+     * Updates the login details for a URL of a user. If the url
+     * username or password are null, the login details for this URL
+     * must be removed.
      *
      * @param sessionID    the session ID for the logged-in user
      * @param urlUsername  the username for the user to be added
diff --git a/programs/original/swen90006/passbook/PassBook.java b/programs/original/swen90006/passbook/PassBook.java
index e0f9024d3b95635c9428d5b80bc29ff5b86d7df5..94e2dfdcd19284dafa914ed1214ff926ea3318da 100644
--- a/programs/original/swen90006/passbook/PassBook.java
+++ b/programs/original/swen90006/passbook/PassBook.java
@@ -179,9 +179,9 @@ public class PassBook
     }
 
     /**
-     * Updates the logic details for a URL of a user. If the url
-     * username or password are null, the username/password details
-     * for this URL are removed.
+     * Updates the login details for a URL of a user. If the url
+     * username or password are null, the login details for this URL
+     * must be removed.
      *
      * @param sessionID    the session ID for the logged-in user
      * @param urlUsername  the username for the user to be added