diff --git a/Documentation/devices.txt b/Documentation/devices.txt
index 10378cc..8f3e2cb 100644
--- a/Documentation/devices.txt
+++ b/Documentation/devices.txt
@@ -1491,10 +1491,17 @@
 		 64 = /dev/radio0	Radio device
 		    ...
 		127 = /dev/radio63	Radio device
+		128 = /dev/swradio0	Software Defined Radio device
+		    ...
+		191 = /dev/swradio63	Software Defined Radio device
 		224 = /dev/vbi0		Vertical blank interrupt
 		    ...
 		255 = /dev/vbi31	Vertical blank interrupt
 
+		Minor numbers are allocated dynamically unless
+		CONFIG_VIDEO_FIXED_MINOR_RANGES (default n)
+		configuration option is set.
+
  81 block	I2O hard disk
 		  0 = /dev/i2o/hdq	17th I2O hard disk, whole disk
 		 16 = /dev/i2o/hdr	18th I2O hard disk, whole disk