diff --git a/sdks/java/core/src/main/java/org/apache/beam/sdk/coders/AvroCoder.java b/sdks/java/core/src/main/java/org/apache/beam/sdk/coders/AvroCoder.java
index 810ef74..a125444 100644
--- a/sdks/java/core/src/main/java/org/apache/beam/sdk/coders/AvroCoder.java
+++ b/sdks/java/core/src/main/java/org/apache/beam/sdk/coders/AvroCoder.java
@@ -724,6 +724,9 @@
    *
    * <p>This is a copy from Avro 1.8's TimestampConversion, which is renamed in Avro 1.9. Defining
    * own copy gives flexibility for Beam Java SDK to work with Avro 1.8 and 1.9 at runtime.
+   *
+   * @see <a href="https://issues.apache.org/jira/browse/BEAM-9144">BEAM-9144: Beam's own Avro
+   *     TimeConversion class in beam-sdk-java-core</a>
    */
   public static class JodaTimestampConversion extends Conversion<DateTime> {
     @Override