diff --git a/esphome/components/duty_cycle/duty_cycle_sensor.cpp b/esphome/components/duty_cycle/duty_cycle_sensor.cpp
index 8b7446b681..c989421948 100644
--- a/esphome/components/duty_cycle/duty_cycle_sensor.cpp
+++ b/esphome/components/duty_cycle/duty_cycle_sensor.cpp
@@ -13,6 +13,7 @@ void DutyCycleSensor::setup() {
   this->store_.pin = this->pin_->to_isr();
   this->store_.last_level = this->pin_->digital_read();
   this->last_update_ = micros();
+  this->store_.last_interrupt = micros();
 
   this->pin_->attach_interrupt(DutyCycleSensorStore::gpio_intr, &this->store_, CHANGE);
 }
diff --git a/esphome/components/duty_cycle/duty_cycle_sensor.h b/esphome/components/duty_cycle/duty_cycle_sensor.h
index 2205bec729..e168f20eff 100644
--- a/esphome/components/duty_cycle/duty_cycle_sensor.h
+++ b/esphome/components/duty_cycle/duty_cycle_sensor.h
@@ -29,7 +29,7 @@ class DutyCycleSensor : public sensor::Sensor, public PollingComponent {
  protected:
   GPIOPin *pin_;
 
-  DutyCycleSensorStore store_;
+  DutyCycleSensorStore store_{};
   uint32_t last_update_;
 };