diff --git a/examples/symba_mars_disk/param.in b/examples/symba_mars_disk/param.in
index 08a0979e6..e2be7eece 100644
--- a/examples/symba_mars_disk/param.in
+++ b/examples/symba_mars_disk/param.in
@@ -19,7 +19,6 @@ CHK_EJECT      3389500000.0
 CHK_QMIN       3389500.0
 CHK_QMIN_COORD HELIO
 CHK_QMIN_RANGE 3389500.0 338950000000.0
-ENC_OUT        /dev/null
 EXTRA_FORCE    no
 BIG_DISCARD    no
 RHILL_PRESENT  yes