diff --git a/examples/kafka-single.yaml b/examples/kafka-single.yaml
index 210dfd0..8764a9d 100644
--- a/examples/kafka-single.yaml
+++ b/examples/kafka-single.yaml
@@ -24,7 +24,19 @@
 configurationOverrides:
   "offsets.topic.replication.factor": 1
   "log.retention.hours": 4
+  "log.message.timestamp.type": "LogAppendTime"
 
+# NOTE: The log.message.timestamp.type override causes timestamps set by the
+# producer be overridden on the broker. This should be removed once all kafka
+# libraries have been updated to use the newer v1 message format that add the
+# timestamp to the message.
+#
+# The `afkak` client in VOLTHA uses the outdated format, and reports -1 as the
+# timestamp.
+#
+# More context:
+#  https://cwiki.apache.org/confluence/display/KAFKA/KIP-32+-+Add+timestamps+to+Kafka+message
+#
 replicas: 1
 
 persistence: