diff --git a/detectors/cds/params/ycf1 b/detectors/cds/params/ycf1
index c9d14bb..e9e540a 100644
--- a/detectors/cds/params/ycf1
+++ b/detectors/cds/params/ycf1
@@ -1,4 +1,4 @@
 #
 # pass1: exonerate parameters
 #
-AssignUndef PASS1_PERCENT       10
+set PASS1_PERCENT=10