diff --git a/LSL2/STPROC/OBJ_PM_SPEC.txt b/LSL2/STPROC/OBJ_PM_SPEC.txt
index 9e27789..0cb6338 100644
--- a/LSL2/STPROC/OBJ_PM_SPEC.txt
+++ b/LSL2/STPROC/OBJ_PM_SPEC.txt
@@ -93,7 +93,9 @@ SchedStart:
         END
         
         IF SchedUnits = 'T' THEN
-            SchedStart = OCONV(PMRec<PM_SCHED_DT$>,'D4'):' ':OCONV(PMRec<PM_SCHED_TM$>,'MT')
+        	ThisSchedTime = OCONV(PMRec<PM_SCHED_TM$>,'MT')
+        	if ThisSchedTime = '' then ThisSchedTime = '00:00'
+            SchedStart = OCONV(PMRec<PM_SCHED_DT$>,'D4'):' ':ThisSchedTime
         END
         
         IF SchedUnits = 'Q' THEN