diff --git a/doc/capturefrm.txt b/doc/capturefrm.txt
index 6957250..fbf1995 100644
--- a/doc/capturefrm.txt
+++ b/doc/capturefrm.txt
@@ -127,6 +127,7 @@ The following values indicate the three types:
 	0	None
 	1	Normalized RSSI
 	2	dBm
+	3 	Raw RSSI
 
 4.11 ssi_signal
 The ssi_signal field contains the signal strength value reported by