1 files changed, 7 insertions, 0 deletions
diff --git a/param.ccl b/param.ccl
index d0bae38..7c6555c 100644
--- a/param.ccl
+++ b/param.ccl
@@ -64,10 +64,17 @@ REAL trapped_surface_delta "find (expansion = delta) surface" STEERABLE = ALWAYS
 ################################################
 ### Parameters for drift correction/tracking ###
 ################################################
+
 BOOLEAN drift_correct_on "Apply drift correction (horizon-tracking shift rotation)?"
 {
 } "no"
 
+INT drift_correct_horizon "Which horizon to use for drift correction"
+{
+0:2  :: "There are only three horizons"
+} 0
+
+
 ########################################
 ### Parameters for surface expansion ###
 ########################################