diff --git a/libraries/Filter/HarmonicNotchFilter.h b/libraries/Filter/HarmonicNotchFilter.h
index 5f1f107ef646a..4a18f405e06bf 100644
--- a/libraries/Filter/HarmonicNotchFilter.h
+++ b/libraries/Filter/HarmonicNotchFilter.h
@@ -119,17 +119,26 @@ class HarmonicNotchFilterParams : public NotchFilterParams {
 
     // set the fundamental center frequency of the harmonic notch
     void set_center_freq_hz(float center_freq) { _center_freq_hz.set(center_freq); }
+
     // set the bandwidth of the harmonic notch
     void set_bandwidth_hz(float bandwidth_hz) { _bandwidth_hz.set(bandwidth_hz); }
+
+    // set the attenuation of the harmonic notch
+    void set_attenuation(float attenuation_dB) { _attenuation_dB.set(attenuation_dB); }
+    
     // harmonics enabled on the harmonic notch
     uint32_t harmonics(void) const { return _harmonics; }
+
     // set the harmonics value
     void set_harmonics(uint32_t hmncs) { _harmonics.set(hmncs); }
+
     // has the user set the harmonics value
     void set_default_harmonics(uint32_t hmncs) { _harmonics.set_default(hmncs); }
+
     // reference value of the harmonic notch
     float reference(void) const { return _reference; }
     void set_reference(float ref) { _reference.set(ref); }
+
     // notch options
     bool hasOption(Options option) const { return _options & uint16_t(option); }
     // notch dynamic tracking mode
diff --git a/libraries/Filter/tests/test_notchfilter.cpp b/libraries/Filter/tests/test_notchfilter.cpp
index 65390a9b841d6..011ae897f48d5 100644
--- a/libraries/Filter/tests/test_notchfilter.cpp
+++ b/libraries/Filter/tests/test_notchfilter.cpp
@@ -106,7 +106,13 @@ TEST(NotchFilterTest, HarmonicNotchTest)
         for (uint8_t c=0; c<chained_filters; c++) {
             auto &f = filters[i][c];
             f.allocate_filters(num_harmonics, harmonics, double_notch?2:1);
-            f.init(rate_hz, base_freq, bandwidth, attenuation_dB);
+            HarmonicNotchFilterParams notch_params {};
+            notch_params.set_attenuation(attenuation_dB);
+            notch_params.set_bandwidth_hz(bandwidth);
+            notch_params.set_center_freq_hz(base_freq);
+            notch_params.set_freq_min_ratio(1.0);
+            f.init(rate_hz, notch_params);
+            f.update(base_freq);
         }
     }