diff --git a/examples/USER/eff/fixed-core/C2H6/in.C2H6fc.bohr b/examples/USER/eff/fixed-core/C2H6/in.C2H6fc.bohr
index 399944cf8da8270129363695a6a17e23afbde6ca..c2bc536c6d77d29bfb99845ade9cc9befbf3464e 100644
--- a/examples/USER/eff/fixed-core/C2H6/in.C2H6fc.bohr
+++ b/examples/USER/eff/fixed-core/C2H6/in.C2H6fc.bohr
@@ -48,7 +48,7 @@ undump		1
 undump		2
 undump          3
 
-fix		1 all nvt/eff 1 2000 1.0
+fix		1 all nvt/eff temp 1 2000 1.0
 dump            2 all custom 10 ${sname}.nvt.lammpstrj id type q c_1[1] c_1[2] x y z fx fy fz c_1[3]
 
 run		10000