diff --git a/res/res_monitor.c b/res/res_monitor.c
index 1264ad0a3356c5d375e2cd37cbdcaaebd50bc9bc..f9bc9913e111e94e089c11b265cae853323c7f4b 100644
--- a/res/res_monitor.c
+++ b/res/res_monitor.c
@@ -672,6 +672,19 @@ enum {
 	MON_FLAG_DROP_IN =  (1 << 2),
 	MON_FLAG_DROP_OUT = (1 << 3),
 	MON_FLAG_BEEP =     (1 << 4),
+
+	/*!
+	 * \brief Dummy option to silence WARNINGs.
+	 *
+	 * Application argument processing was updated to emit a WARNING when an
+	 * unrecognized option was encountered. Previously, unrecognized options
+	 * were silently ignored which was taken advantage of by code in this module
+	 * to "stamp out" problematic application arguments and replace them with 'X.'
+	 *
+	 * So to silence the warning we add 'X' as a valid option and just don't do
+	 * anything if it's set.
+	 */
+	MON_FLAG_DUMMY =    (1 << 5),
 };
 
 enum {
@@ -685,6 +698,7 @@ AST_APP_OPTIONS(monitor_opts, {
 	AST_APP_OPTION('i', MON_FLAG_DROP_IN),
 	AST_APP_OPTION('o', MON_FLAG_DROP_OUT),
 	AST_APP_OPTION_ARG('B', MON_FLAG_BEEP, OPT_ARG_BEEP_INTERVAL),
+	AST_APP_OPTION('X', MON_FLAG_DUMMY),
 });
 
 /*!