diff --git a/regtest/analysis/rt-mds/plumed.dat b/regtest/analysis/rt-mds/plumed.dat
index 2d8d22c09ce508dc3313b4ebcface5d989294bea..385718a58a557308b6171c1722d7fe4bc75e0c71 100755
--- a/regtest/analysis/rt-mds/plumed.dat
+++ b/regtest/analysis/rt-mds/plumed.dat
@@ -15,7 +15,7 @@ UPPER_WALLS ARG=d6 AT=2.0 KAPPA=100.
 DISTANCE ATOMS=7,com LABEL=d7
 UPPER_WALLS ARG=d7 AT=2.0 KAPPA=100.
 
-COORDINATIONNUMBER SPECIES=1-7 MOMENTS=2-3 SWITCH={RATIONAL R_0=1.5 NN=8 MM=16} LABEL=c1
+COORDINATIONNUMBER SPECIES=1-7 MOMENTS=2-3 SWITCH={RATIONAL R_0=1.5 NN=8} LABEL=c1
 CLASSICAL_MDS ... 
   ARG=c1.moment-2,c1.moment-3 
   REWEIGHT_TEMP=0.1 TEMP=0.2