diff --git a/applications/lofar2/model/rtdsp/firfilter.py b/applications/lofar2/model/rtdsp/firfilter.py
index 55ef871462e0299fbdc84e076c132f7bf21803a1..8ae1a6c419c7b24b005a570ab4d8c6de0fd0d819 100644
--- a/applications/lofar2/model/rtdsp/firfilter.py
+++ b/applications/lofar2/model/rtdsp/firfilter.py
@@ -297,7 +297,7 @@ def design_fir_low_pass_filter(method,
 
 def design_fir_low_pass_filter_adjust(method,
                                       Ncoefs, fpass, fstop, fcutoff, cutoffGain=0.5, rippleWeights=[1, 1],
-                                      kaiserBeta=0, fs=1.0, resolution=1e-3, verbosity=1):
+                                      kaiserBeta=0, fs=1.0, resolution=1e-4, verbosity=1):
     """Derive FIR coefficients for low pass filter for exact fcutoff
 
     Uses design_fir_low_pass_filter() but achieves cutoffGain at fcutoff by adjusting fpass or fstop, and