diff --git a/firmware/baseband/dsp_iir_config.hpp b/firmware/baseband/dsp_iir_config.hpp
index ad9b81f9..171a8969 100644
--- a/firmware/baseband/dsp_iir_config.hpp
+++ b/firmware/baseband/dsp_iir_config.hpp
@@ -25,7 +25,7 @@
 #include "dsp_iir.hpp"
 
 // scipy.signal.butter(2, 300 / 24000.0, 'highpass', analog=False)
-constexpr iir_biquad_config_t audio_hpf_config {
+constexpr iir_biquad_config_t audio_hpf_300hz_config {
 	{  0.97261390f, -1.94522780f,  0.97261390f, },
 	{  1.00000000f, -1.94447766f,  0.94597794f, }
 };
diff --git a/firmware/baseband/proc_am_audio.hpp b/firmware/baseband/proc_am_audio.hpp
index 4779384b..bdceaa51 100644
--- a/firmware/baseband/proc_am_audio.hpp
+++ b/firmware/baseband/proc_am_audio.hpp
@@ -54,7 +54,7 @@ private:
 
 	dsp::demodulate::AM demod;
 
-	IIRBiquadFilter audio_hpf { audio_hpf_config };
+	IIRBiquadFilter audio_hpf { audio_hpf_300hz_config };
 
 	SpectrumCollector channel_spectrum;
 };
diff --git a/firmware/baseband/proc_nfm_audio.hpp b/firmware/baseband/proc_nfm_audio.hpp
index 3e1d2205..9ad71fea 100644
--- a/firmware/baseband/proc_nfm_audio.hpp
+++ b/firmware/baseband/proc_nfm_audio.hpp
@@ -61,7 +61,7 @@ private:
 
 	dsp::demodulate::FM demod;
 
-	IIRBiquadFilter audio_hpf { audio_hpf_config };
+	IIRBiquadFilter audio_hpf { audio_hpf_300hz_config };
 	IIRBiquadFilter audio_deemph { audio_deemph_300_6_config };
 	FMSquelch squelch;