diff --git a/meshtastic/module_config.proto b/meshtastic/module_config.proto
index 10753c6c..ec0bc3e0 100644
--- a/meshtastic/module_config.proto
+++ b/meshtastic/module_config.proto
@@ -602,7 +602,8 @@ message ModuleConfig {
     bool enabled = 1;
 
     /*
-     * Send out range test messages from this node
+     * Sender interval. How long to wait between sending sequential test packets.
+     * 0 is default which disables sending messages.
      */
     uint32 sender = 2;