diff --git a/app/cmTimeLine.c b/app/cmTimeLine.c
index 9b26908..1f1282c 100644
--- a/app/cmTimeLine.c
+++ b/app/cmTimeLine.c
@@ -1591,6 +1591,7 @@ cmTlRC_t cmTimeLineGenOnsetMarks( cmTlH_t h, unsigned seqId )
 
 cmTlRC_t cmTimeLineDeleteOnsetMarks( cmTlH_t h, unsigned seqId )
 {
+  return kOkTlRC;
 }