diff --git a/lib/msk144sim.f90 b/lib/msk144sim.f90
index dbb46a0e2..0a5a67529 100644
--- a/lib/msk144sim.f90
+++ b/lib/msk144sim.f90
@@ -4,12 +4,16 @@ program msk144sim
   parameter (NMAX=15*12000)
   real pings(0:NMAX-1)
   real waveform(0:NMAX-1)
+  character*6 mygrid
   character arg*8,msg*22,msgsent*22,fname*40
   real wave(0:NMAX-1)              !Simulated received waveform
   real*8 twopi,freq,phi,dphi0,dphi1,dphi
   type(hdr) h                          !Header for .wav file
   integer*2 iwave(0:NMAX-1)
   integer itone(144)                   !Message bits
+  integer*1 bcontest
+  data mygrid/"EN50wc"/
+  data bcontest/0/
 
   nargs=iargc()
   if(nargs.ne.5) then
@@ -33,7 +37,7 @@ program msk144sim
   h=default_header(12000,NMAX)
 
   ichk=0
-  call genmsk144(msg,ichk,msgsent,itone,itype) 
+  call genmsk144(msg,mygrid,ichk,bcontest,msgsent,itone,itype) 
   twopi=8.d0*atan(1.d0)
 
   nsym=144