diff --git a/csdr/__init__.py b/csdr/__init__.py
index 2ac0d7a..166a7e2 100644
--- a/csdr/__init__.py
+++ b/csdr/__init__.py
@@ -120,7 +120,7 @@ class Dsp(DirewolfConfigSubscriber):
             return chain
         chain += ["csdr++ shift --fifo {shift_pipe}"]
         if self.decimation > 1:
-            chain += ["csdr fir_decimate_cc {decimation} {ddc_transition_bw} HAMMING"]
+            chain += ["csdr++ firdecimate {decimation} {ddc_transition_bw} --window hamming"]
         chain += ["csdr bandpass_fir_fft_cc --fifo {bpf_pipe} {bpf_transition_bw} HAMMING"]
         if self.output.supports_type("smeter"):
             chain += [
diff --git a/owrx/source/resampler.py b/owrx/source/resampler.py
index 141a721..9fb6aea 100644
--- a/owrx/source/resampler.py
+++ b/owrx/source/resampler.py
@@ -24,7 +24,7 @@ class Resampler(DirectSource):
         return [
             "nc -v 127.0.0.1 {nc_port}".format(nc_port=self.sdr.getPort()),
             "csdr++ shift {shift}".format(shift=self.shift),
-            "csdr fir_decimate_cc {decimation} {ddc_transition_bw} HAMMING".format(
+            "csdr++ firdecimate {decimation} {ddc_transition_bw} --window hamming".format(
                 decimation=self.decimation, ddc_transition_bw=self.transition_bw
             ),
         ] + self.getNmuxCommand()