diff --git a/src/main/java/seedu/address/model/person/Comment.java b/src/main/java/seedu/address/model/person/Comment.java
index 3b6360c9350..e5c4cdce1dd 100644
--- a/src/main/java/seedu/address/model/person/Comment.java
+++ b/src/main/java/seedu/address/model/person/Comment.java
@@ -12,7 +12,7 @@ public class Comment {
             "comments should only contain alphanumeric characters and spaces, and it should not be blank";
 
     public static final String VALIDATION_REGEX = "[\\p{Alnum}][\\p{Alnum} ]*";
-    public String fullComment;
+    public final String fullComment;
 
     /**
      * Constructs a {@code Comment}.