diff --git a/src/main/java/org/cactoos/map/MapOf.java b/src/main/java/org/cactoos/map/MapOf.java
index 17461dc6b..8a580f597 100644
--- a/src/main/java/org/cactoos/map/MapOf.java
+++ b/src/main/java/org/cactoos/map/MapOf.java
@@ -179,6 +179,8 @@ public MapOf(final Iterable<Map.Entry<? extends X, ? extends Y>> entries) {
     /**
      * Ctor.
      * @param entries List of the entries
+     * @param <X> Key type
+     * @param <Y> Value type
      * @return Map created
      */
     private static <X, Y> Map<X, Y> make(