diff --git a/src/main.c b/src/main.c
index dd954e1..3adcdc1 100644
--- a/src/main.c
+++ b/src/main.c
@@ -948,7 +948,7 @@ static void init_defaults(void)
 	btd_opts.avdtp.session_mode = BT_IO_MODE_BASIC;
 	btd_opts.avdtp.stream_mode = BT_IO_MODE_BASIC;
 
-	btd_opts.advmon.rssi_sampling_period = 0;
+	btd_opts.advmon.rssi_sampling_period = 0xFF;
 }
 
 static void log_handler(const gchar *log_domain, GLogLevelFlags log_level,
diff --git a/src/main.conf b/src/main.conf
index c82d7e6..0c41d77 100644
--- a/src/main.conf
+++ b/src/main.conf
@@ -281,5 +281,9 @@
 [AdvMon]
 # Default RSSI Sampling Period. This is used when a client registers an
 # advertisement monitor and leaves the RSSISamplingPeriod unset.
-# Default: 0
-#RSSISamplingPeriod=0
+# Possible values:
+# 0x00       Report all advertisements
+# N = 0xXX   Report advertisements every N x 100 msec (range: 0x01 to 0xFE)
+# 0xFF       Report only one advertisement per device during monitoring period
+# Default: 0xFF
+#RSSISamplingPeriod=0xFF