diff --git a/src/main/res/values/strings.xml b/src/main/res/values/strings.xml
index 289bf4933..3c5a67b7c 100644
--- a/src/main/res/values/strings.xml
+++ b/src/main/res/values/strings.xml
@@ -882,6 +882,7 @@
     <string name="autocrypt_prefer_e2ee">Prefer End-To-End Encryption</string>
 
     <!-- system messages -->
+    <!-- deprecated -->
     <string name="systemmsg_unknown_sender_for_chat">Unknown sender for this chat. See \'info\' for more details.</string>
     <string name="systemmsg_subject_for_new_contact">Message from %1$s</string>
     <string name="systemmsg_failed_sending_to">Failed to send message to %1$s.</string>