diff --git a/lib/fst240_decode.f90 b/lib/fst240_decode.f90
index 73e33f08e..779c3da73 100644
--- a/lib/fst240_decode.f90
+++ b/lib/fst240_decode.f90
@@ -565,7 +565,7 @@ contains
                   qual=0.
                   fsig=fc_synced - 1.5*hmod*baud
                   if(ex) then
-                     write(21,'(i6.6,8i6,f7.1,f10.2,f7.1,1x,f7.2,1x,f7.1,1x,a37,f5.1)') &
+                     write(21,'(i6.6,8i6,f7.1,f10.2,f7.1,1x,f7.2,1x,f7.1,1x,a37,f5.3)') &
                         nutc,icand,itry,nsyncoh,iaptype,ijitter,ntype,nsync_qual,  &
                         nharderrors,dmin,sync,xsnr,xdt,fsig,msg,w50
                      flush(21)