diff --git a/CHANGES.txt b/CHANGES.txt
index 4c24b35eaa..fd6c8a19c6 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,4 +1,6 @@
 2.1.12
+ * Fix logback-tools.xml incorrectly configured for outputing to System.err
+   (CASSANDRA-9937)
  * Fix streaming to catch exception so retry not fail (CASSANDRA-10557)
  * Add validation method to PerRowSecondaryIndex (CASSANDRA-10092)
  * Support encrypted and plain traffic on the same port (CASSANDRA-10559)
diff --git a/conf/logback-tools.xml b/conf/logback-tools.xml
index ade6c12d86..e47985e91d 100644
--- a/conf/logback-tools.xml
+++ b/conf/logback-tools.xml
@@ -18,7 +18,8 @@
 -->
 
 <configuration>
-  <appender name="STDERR" target="System.err" class="ch.qos.logback.core.ConsoleAppender">
+  <appender name="STDERR" class="ch.qos.logback.core.ConsoleAppender">
+    <target>System.err</target>
     <encoder>
       <pattern>%-5level %date{HH:mm:ss,SSS} %msg%n</pattern>
     </encoder>