diff --git a/build/pdp10-ka/start b/build/pdp10-ka/start
index e731095c..cdbaa7f6 100755
--- a/build/pdp10-ka/start
+++ b/build/pdp10-ka/start
@@ -83,7 +83,7 @@ gt40 - Start a GT40 emulator.
 imlac - Start an Imlac PDS-1 emulator.
 simh_imlac - Start the SIMH Imlac PDS-1 emulator.
 tv11 - Start a TV-11 emulator.
-tvcon - Start a TV display.
+tvcon - Start a TV display.  This requires tv11.
 datapoint - Start a Datapoint 3300 emulator.
 vt52 - Start a VT52 emulator.
 tek - Start a Tektronix 4010 emulator.