diff --git a/PARAM/SHMS/DC/pdc_tracking.param b/PARAM/SHMS/DC/pdc_tracking.param
index 3b9520b158683a63dde027e58e4862e2f37d0d4d..d7a510c44bc17fac31f22ca813f7a2f28b72af23 100644
--- a/PARAM/SHMS/DC/pdc_tracking.param
+++ b/PARAM/SHMS/DC/pdc_tracking.param
@@ -14,8 +14,8 @@ pdc_tdc_max_win = 55000, 55000, 55000, 55000, 55000, 55000  ; TODO - wide limits
 pdc_tdc_time_per_channel = -0.10
 
 ; Zero time correction for each plane in ns that is added to TDC time.
-pdc_plane_time_zero = 1440.0, 1440.0, 1440.0, 1440.0, 1440.0, 1440.0  ; TODO - SOS values for now
-                      1440.0, 1440.0, 1440.0, 1440.0, 1440.0, 1440.0
+pdc_plane_time_zero = 1260.0, 1260.0, 1260.0, 1260.0, 1260.0, 1260.0  ; TODO - SOS values for now
+                      1260.0, 1260.0, 1260.0, 1260.0, 1260.0, 1260.0
 
 ; For wire velocity corrections.
 pdc_wire_velocity = 13.0  ; TODO