diff --git a/map65/libm65/q65b.f90 b/map65/libm65/q65b.f90
index 1df35b82c..c88686ecb 100644
--- a/map65/libm65/q65b.f90
+++ b/map65/libm65/q65b.f90
@@ -140,7 +140,7 @@ subroutine q65b(nutc,nqd,nxant,fcenter,nfcal,nfsample,ikhz,mousedf,ntol,xpol, &
   ndpth=3
 
 ! NB: Frequency of ipk is now shifted to 1000 Hz.
-  call map65_mmdec(nutc,iwave,nqd,nsubmode,nfa,nfb,1000,ntol,     &
+  call map65_mmdec(nutc,iwave,nqd,60,nsubmode,nfa,nfb,1000,ntol,     &
        newdat,nagain,max_drift,ndepth,mycall,hiscall0,hisgrid)
 
   MHz=fcenter