--- a/doc/upmpdcli-config.txt
+++ b/doc/upmpdcli-config.txt
@@ -79,6 +79,13 @@
 configuration file. Depending on your situation, you may see this as a
 security risk. The default is true, because I don't see this as a real
 issue in the general case.
+
+[[checkcontentformat]]
+checkcontentformat:: Check that
+input format is supported. Extract the protocolinfo
+information from the input metadata and check it against our supported
+formats. Set this option to 0 if a control point or media server sends
+good audio data with bad metadata.
 
 [[opensslcmd]]
 opensslcmd:: Path to the openssl command The OHCredentials service needs openssl 1.1.x or newer.