diff --git a/bench/in.rhodo b/bench/in.rhodo
index 295fb4539f..bd7e3df7f5 100644
--- a/bench/in.rhodo
+++ b/bench/in.rhodo
@@ -15,8 +15,8 @@ kspace_style    pppm 1e-4
 read_data       data.rhodo
 
 fix             1 all shake 0.0001 5 0 m 1.0 a 232
-fix             2 all npt 300.0 300.0 100.0 &
-		aniso NULL NULL NULL NULL 0.0 0.0 1000.0
+fix             2 all npt temp 300.0 300.0 100.0 &
+		z 0.0 0.0 1000.0 mtk no pchain 0 tchain 1
 
 special_bonds   charmm
  
diff --git a/bench/in.rhodo.scaled b/bench/in.rhodo.scaled
index 57833e6dc2..3debe44867 100644
--- a/bench/in.rhodo.scaled
+++ b/bench/in.rhodo.scaled
@@ -22,8 +22,8 @@ read_data       data.rhodo
 replicate	$x $y $z
 
 fix             1 all shake 0.0001 5 0 m 1.0 a 232
-fix             2 all npt 300.0 300.0 100.0 &
-		aniso NULL NULL NULL NULL 0.0 0.0 1000.0
+fix             2 all npt temp 300.0 300.0 100.0 &
+		z 0.0 0.0 1000.0 mtk no pchain 0 tchain 1
 
 special_bonds   charmm