diff --git a/src/Matchbox/PQCDLevel.in b/src/Matchbox/PQCDLevel.in
--- a/src/Matchbox/PQCDLevel.in
+++ b/src/Matchbox/PQCDLevel.in
@@ -1,13 +1,13 @@
 # -*- ThePEG-repository -*-
 
 set /Herwig/DipoleShower/DipoleShowerHandler:MPIHandler NULL
 set /Herwig/Shower/ShowerHandler:MPIHandler NULL
 set /Herwig/Shower/PowhegShowerHandler:MPIHandler NULL
 
-set /Herwig/Shower/ShowerHandler:Interaction QCD
+set /Herwig/Shower/ShowerHandler:Interactions QCD
 
 cd /Herwig/EventHandlers
 set EventHandler:HadronizationHandler NULL
 set EventHandler:DecayHandler NULL
 set /Herwig/Analysis/Basics:CheckQuark No