diff --git a/esphome/components/sts3x/sts3x.h b/esphome/components/sts3x/sts3x.h
index 9dba991dfa..8b55a5160c 100644
--- a/esphome/components/sts3x/sts3x.h
+++ b/esphome/components/sts3x/sts3x.h
@@ -11,7 +11,6 @@ namespace sts3x {
 class STS3XComponent : public PollingComponent, public i2c::I2CDevice {
  public:
   void set_temperature_sensor(sensor::Sensor *temperature_sensor) { temperature_sensor_ = temperature_sensor; }
-  void set_humidity_sensor(sensor::Sensor *humidity_sensor) { humidity_sensor_ = humidity_sensor; }
 
   void setup() override;
   void dump_config() override;
@@ -23,7 +22,6 @@ class STS3XComponent : public PollingComponent, public i2c::I2CDevice {
   bool read_data_(uint16_t *data, uint8_t len);
 
   sensor::Sensor *temperature_sensor_;
-  sensor::Sensor *humidity_sensor_;
 };
 
 }  // namespace sts3x