diff --git a/esphome/components/sensor/filter.cpp b/esphome/components/sensor/filter.cpp
index 0105580d26..dbd6f4d34b 100644
--- a/esphome/components/sensor/filter.cpp
+++ b/esphome/components/sensor/filter.cpp
@@ -164,8 +164,6 @@ optional<float> ExponentialMovingAverageFilter::new_value(float value) {
   }
   return {};
 }
-void ExponentialMovingAverageFilter::set_send_every(uint16_t send_every) { this->send_every_ = send_every; }
-void ExponentialMovingAverageFilter::set_alpha(float alpha) { this->alpha_ = alpha; }
 
 // ThrottleAverageFilter
 ThrottleAverageFilter::ThrottleAverageFilter(uint32_t time_period) : time_period_(time_period) {}
diff --git a/esphome/components/sensor/filter.h b/esphome/components/sensor/filter.h
index b79bfa17d6..bc086e3805 100644
--- a/esphome/components/sensor/filter.h
+++ b/esphome/components/sensor/filter.h
@@ -239,8 +239,8 @@ class ExponentialMovingAverageFilter : public Filter {
 
   optional<float> new_value(float value) override;
 
-  void set_send_every(uint16_t send_every);
-  void set_alpha(float alpha);
+  void set_send_every(uint16_t send_every) { this->send_every_ = send_every; }
+  void set_alpha(float alpha) { this->alpha_ = alpha; }
 
  protected:
   float accumulator_{NAN};