diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml b/hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml
index 20d95d59d5c..5048bc8e2b3 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml
@@ -3810,6 +3810,7 @@
   <value>16</value>
   <description>
     Socket cache capacity (in entries) for short-circuit reads.
+    If this value is set to 0, the client socket cache is disabled.
   </description>
 </property>