diff --git a/examples/symba_chambers_2013/param.in b/examples/symba_chambers_2013/param.in
index 31ce47985..2e263e1b5 100644
--- a/examples/symba_chambers_2013/param.in
+++ b/examples/symba_chambers_2013/param.in
@@ -25,6 +25,7 @@ DU2M           1.495979e11        ! distance unit to meters (AU --> m)
 TU2S           3.15569259747e7    ! time unit to seconds (years --> seconds)
 GMTINY         1e-10		  
 ENERGY         yes
+ENERGY_OUT     energy.dat
 ROTATION       yes
 FRAGMENTATION  yes
 DISCARD_OUT    discard.out