Index: /trunk/FACT++/src/fadctrl.cc
===================================================================
--- /trunk/FACT++/src/fadctrl.cc	(revision 12637)
+++ /trunk/FACT++/src/fadctrl.cc	(revision 12638)
@@ -1814,5 +1814,6 @@
         T::AddEvent("LOAD_DRS_CALIBRATION", "C")
             (bind(&StateMachineFAD::LoadDrsCalibration, this, placeholders::_1))
-            ("");
+            ("Load a DRS calibration file"
+             "|absolute path");