diff --git a/subtractft8.f90 b/subtractft8.f90
index 6f6ec88..67aed84 100644
--- a/subtractft8.f90
+++ b/subtractft8.f90
@@ -10,7 +10,7 @@ subroutine subtractft8(dd,itone,f0,dt)
   use timer_module, only: timer
 
   parameter (NMAX=15*4000,NFRAME=640*79)
-  parameter (NFFT=NMAX,NFILT=1400)
+  parameter (NFFT=NMAX,NFILT=700)
   real*4 window(-NFILT/2:NFILT/2)
   complex dd(NMAX)
   complex cref,camp,cfilt,cw