diff --git a/PARAM/SHMS/HODO/phodo.pos b/PARAM/SHMS/HODO/phodo.pos
index c103000c29bb454832b609b18e1fa7f24410a38e..134675c3c5a7eb88974ad7ba6c20c5e12d36154d 100644
--- a/PARAM/SHMS/HODO/phodo.pos
+++ b/PARAM/SHMS/HODO/phodo.pos
@@ -58,7 +58,7 @@ phodo_plane_names = "1x 1y 2x 2y"
                         35.
                         42. 
       pscin_2x_left  =  55.
-      pscin_2x_right =  55.
+      pscin_2x_right =  -55.
       pscin_2x_offset=  0.0
       pscin_2x_center=  -58.5
                         -49.5