diff --git a/scst/README b/scst/README
index f2755bd19..97d29c839 100644
--- a/scst/README
+++ b/scst/README
@@ -690,6 +690,12 @@ Each session subdirectory contains the following entries:
 See below description of the VDISK's sysfs interface for samples.
 
 
+Each sessions/<sess>/lun<X> subdirectory contains the following entries:
+
+ - active_commands - contains number of active, i.e. not yet or being
+   executed, SCSI commands for lun<X> in session <sess>.
+
+
 Access and devices visibility management (LUN masking)
 ------------------------------------------------------
 
diff --git a/scst/README_in-tree b/scst/README_in-tree
index 658abb10b..bba390adc 100644
--- a/scst/README_in-tree
+++ b/scst/README_in-tree
@@ -552,6 +552,12 @@ Each session subdirectory contains the following entries:
 See below description of the VDISK's sysfs interface for samples.
 
 
+Each sessions/<sess>/lun<X> subdirectory contains the following entries:
+
+ - active_commands - contains number of active, i.e. not yet or being
+   executed, SCSI commands for lun<X> in session <sess>.
+
+
 Access and devices visibility management (LUN masking)
 ------------------------------------------------------