diff --git a/src/main/flight/rpm_filter.c b/src/main/flight/rpm_filter.c
index 464795e966..e4f5266c2d 100644
--- a/src/main/flight/rpm_filter.c
+++ b/src/main/flight/rpm_filter.c
@@ -94,6 +94,8 @@ void rpmFilterInit(const rpmFilterConfig_t *config, const timeUs_t looptimeUs)
         pt1FilterInit(&motorFreqLpf[i], pt1FilterGain(config->rpm_filter_lpf_hz, looptimeUs * 1e-6f));
     }
 
+    erpmToHz = ERPM_PER_LSB / SECONDS_PER_MINUTE  / (motorConfig()->motorPoleCount / 2.0f);
+
     // if RPM Filtering is configured to be off
     if (!config->rpm_filter_harmonics) {
         return;
@@ -115,8 +117,6 @@ void rpmFilterInit(const rpmFilterConfig_t *config, const timeUs_t looptimeUs)
         }
     }
 
-    erpmToHz = ERPM_PER_LSB / SECONDS_PER_MINUTE  / (motorConfig()->motorPoleCount / 2.0f);
-
     const float loopIterationsPerUpdate = RPM_FILTER_DURATION_S / (looptimeUs * 1e-6f);
     const float numNotchesPerAxis = getMotorCount() * rpmFilter.numHarmonics;
     notchUpdatesPerIteration = ceilf(numNotchesPerAxis / loopIterationsPerUpdate); // round to ceiling