diff --git a/gcom2.f90 b/gcom2.f90
index 7b13547df..2cf692a58 100644
--- a/gcom2.f90
+++ b/gcom2.f90
@@ -19,6 +19,7 @@ integer mcall3         !CALL3.TXT has been modified          GUI,Decoder
 integer mousebutton    !Which button was clicked?               GUI
 integer multicast      !1 for multicast data, 0 for unicast     GUI
 integer ndecdone       !Is decoder finished?                 GUI,Decoder
+integer nfloat         !Floating-point data from Linrad?        GUI
 integer ierr           !Error opening *.tf2 file                GUI
 integer lauto          !Are we in Auto mode?                    GUI
 integer mantx          !Manual transmission requested?       GUI,SoundIn
@@ -107,7 +108,7 @@ character*8 utcdata     !HHMM UTC for the processed data       Decoder
 common/gcom2/fcenter,ps0(431),psavg(450),s2(64,3100),ccf(-5:540),           &
      green(500),fselect,pctlost,pctblank,rxnoise,dphi,ngreen,dgain,         &
      ndecoding,ndecoding0,mcall3,mousebutton,multicast,nsetftx,ierr,        &
-     ndecdone,lauto,mantx,nrestart,ntr,nmsg,nsave,nadd5,                    &
+     ndecdone,nfloat,lauto,mantx,nrestart,ntr,nmsg,nsave,nadd5,             &
      dftolerance,LDecoded,rxdone,monitoring,nzap,minsigdb,                  &
      nclearave,nfreeze,nafc,ncsmin,newspec,nfa,nfb,nfcal,idphi,nkeep,       &
      nmode,mode65,nbpp,ndebug,ndphi,nhispol,nt1,nxant,                      &
diff --git a/map65.py b/map65.py
index 82c72ba6b..72b3a93ee 100644
--- a/map65.py
+++ b/map65.py
@@ -59,6 +59,8 @@ bm_geom=""
 bm2_geom=""
 cmap0="Linrad"
 fileopened=""
+floatpt=IntVar()
+floatpt.set(0)
 font1='Helvetica'
 fqso0=125
 hiscall=""
@@ -1307,6 +1309,7 @@ def update():
     Audio.gcom2.neme=neme.get()
     Audio.gcom2.ndepth=ndepth.get()
     Audio.gcom2.multicast=multicast.get()
+    Audio.gcom2.nfloat=floatpt.get()
     Audio.gcom2.nxant=options.xant.get()
     try:
         Audio.gcom2.idinterval=options.IDinterval.get()
@@ -1405,6 +1408,8 @@ setupmenu.add_radiobutton(label = 'Input data multicast', variable=multicast, \
 setupmenu.add_radiobutton(label = 'Input data unicast', variable=multicast, \
             value=0)
 setupmenu.add_separator()
+setupmenu.add_checkbutton(label = 'Floating point data', variable=floatpt)
+setupmenu.add_separator()
 setupmenu.add_checkbutton(label = 'Enable diagnostics',variable=ndebug)
 setupmenu.add_checkbutton(label = 'Verbose diagnostics',variable=ndebug2)
 
@@ -1879,6 +1884,7 @@ try:
         elif key == 'Multicast': multicast.set(value)
         elif key == 'Debug': ndebug.set(value)
         elif key == 'Debug2': ndebug2.set(value)
+        elif key == 'FloatPt': floatpt.set(value)
         elif key == 'HisCall':
             Audio.gcom2.hiscall=(value+'            ')[:12]
             ToRadio.delete(0,99)
@@ -1976,6 +1982,7 @@ f.write("NDepth " + str(ndepth.get()) + "\n")
 f.write("Multicast " + str(multicast.get()) + "\n")
 f.write("Debug " + str(ndebug.get()) + "\n")
 f.write("Debug2 " + str(ndebug2.get()) + "\n")
+f.write("FloatPt " + str(floatpt.get()) + "\n")
 mrudir2=mrudir.replace(" ","#")
 f.write("MRUDir " + mrudir2 + "\n")
 if g.astro_geom[:7]=="200x200": g.astro_geom="316x373" + g.astro_geom[7:]