diff --git a/Config_Positioner.md b/Config_Positioner.md
index 67fa9e8..0b7a65d 100644
--- a/Config_Positioner.md
+++ b/Config_Positioner.md
@@ -173,7 +173,7 @@ This positioner type interfaces with the [EPICS](https://epics.anl.gov/) hardwar
  **Default**: false
 
 **stopMovingChannel**::<BR>
-&emsp;String value defines ???.<BR>
+&emsp;String value defines the EPICS channel that is used to stop a motion when a "All Motors Off" is requested.<BR>
 &emsp;**Default**: empty string