diff --git a/src/main/java/org/apache/commons/collections4/map/ReferenceMap.java b/src/main/java/org/apache/commons/collections4/map/ReferenceMap.java
index 7c5a12482..5f98bb6d6 100644
--- a/src/main/java/org/apache/commons/collections4/map/ReferenceMap.java
+++ b/src/main/java/org/apache/commons/collections4/map/ReferenceMap.java
@@ -186,10 +186,10 @@ public class ReferenceMap<K, V> extends AbstractReferenceMap<K, V> implements Se
     }
 
     /**
-     * Write the map out using a custom routine.
+     * Serializes this object to an ObjectOutputStream.
      *
-     * @param out  the output stream
-     * @throws IOException if an error occurs while writing to the stream
+     * @param out the target ObjectOutputStream.
+     * @throws IOException thrown when an I/O errors occur writing to the target stream.
      */
     private void writeObject(final ObjectOutputStream out) throws IOException {
         out.defaultWriteObject();