diff --git a/src/HJetsProcesses.in b/src/HJetsProcesses.in
--- a/src/HJetsProcesses.in
+++ b/src/HJetsProcesses.in
@@ -1,37 +1,37 @@
 # -*- ThePEG-repository -*-
 
 cd /Herwig/MatrixElements/Matchbox/Amplitudes
 mkdir HJets
 cd HJets
 
 create HJets::Amplitudehqqbarkkbar Amplitudehqqbarkkbar
 set Amplitudehqqbarkkbar:ColourBasis /Herwig/MatrixElements/Matchbox/Amplitudes/TraceBasis
 
 create HJets::Amplitudehqqbarkkbarg Amplitudehqqbarkkbarg
 set Amplitudehqqbarkkbarg:ColourBasis /Herwig/MatrixElements/Matchbox/Amplitudes/TraceBasis
 
 create HJets::Amplitudehqqbarkkbargg Amplitudehqqbarkkbargg
 set Amplitudehqqbarkkbargg:ColourBasis /Herwig/MatrixElements/Matchbox/Amplitudes/TraceBasis
 
 create HJets::Amplitudehqqbarkkbarrrbar Amplitudehqqbarkkbarrrbar
 set Amplitudehqqbarkkbarrrbar:ColourBasis /Herwig/MatrixElements/Matchbox/Amplitudes/TraceBasis
 
 insert /Herwig/MatrixElements/Matchbox/Factory:Amplitudes 0 Amplitudehqqbarkkbar
 insert /Herwig/MatrixElements/Matchbox/Factory:Amplitudes 0 Amplitudehqqbarkkbarg
 insert /Herwig/MatrixElements/Matchbox/Factory:Amplitudes 0 Amplitudehqqbarkkbargg
 insert /Herwig/MatrixElements/Matchbox/Factory:Amplitudes 0 Amplitudehqqbarkkbarrrbar
 
 
 insert /Herwig/MatrixElements/Matchbox/Utility/DiagramGenerator:ExcludeVertices 0 /Herwig/Vertices/FFPVertex
 insert /Herwig/MatrixElements/Matchbox/Utility/DiagramGenerator:ExcludeVertices 0 /Herwig/Vertices/FFHVertex
 insert /Herwig/MatrixElements/Matchbox/Utility/DiagramGenerator:ExcludeVertices 0 /Herwig/Vertices/HGGVertex
 
-set /Herwig/MatrixElements/Matchbox/Factory:FixedQEDCouplings On
+set /Herwig/MatrixElements/Matchbox/Factory:FixedQEDCouplings Yes
 
 cd /Herwig/Particles
 
 set h0:HardProcessWidth 0*GeV
 do W+:UnsetHardProcessWidth
 do W-:UnsetHardProcessWidth
 do Z0:UnsetHardProcessWidth