diff --git a/collect_app/src/main/java/org/odk/collect/android/preferences/utilities/KnownUrlListUtils.java b/collect_app/src/main/java/org/odk/collect/android/preferences/utilities/KnownUrlListUtils.java
index 03d88299865..59a68feeac0 100644
--- a/collect_app/src/main/java/org/odk/collect/android/preferences/utilities/KnownUrlListUtils.java
+++ b/collect_app/src/main/java/org/odk/collect/android/preferences/utilities/KnownUrlListUtils.java
@@ -17,6 +17,8 @@ public class KnownUrlListUtils {
     private KnownUrlListUtils() {
     }
 
+    // The method adds a new url to the list if it doesn't already exist. The list is intended to
+    // keep up to 5 elements so the oldest one is removed if needed.
     public static void addUrlToList(String url) {
         List<String> urlList = getUrlList();