diff --git a/oak-commons/src/main/java/org/apache/jackrabbit/oak/commons/collections/CollectionUtils.java b/oak-commons/src/main/java/org/apache/jackrabbit/oak/commons/collections/CollectionUtils.java
index 4563f173c32..f08ba6cfa17 100644
--- a/oak-commons/src/main/java/org/apache/jackrabbit/oak/commons/collections/CollectionUtils.java
+++ b/oak-commons/src/main/java/org/apache/jackrabbit/oak/commons/collections/CollectionUtils.java
@@ -36,6 +36,8 @@
  */
 public class CollectionUtils {
 
+    // Maximum capacity for a hash based collection. (used internally by JDK).
+    // Also, it helps to avoid overflow errors when calculating the capacity
     private static final int MAX_CAPACITY = 1 << 30;
 
     private CollectionUtils() {