diff --git a/esphome/components/optolink/datapoint_component.cpp b/esphome/components/optolink/datapoint_component.cpp
index 662aa303be..c059ec68a5 100644
--- a/esphome/components/optolink/datapoint_component.cpp
+++ b/esphome/components/optolink/datapoint_component.cpp
@@ -259,7 +259,7 @@ void DatapointComponent::set_optolink_state_(const char *format, ...) {
 
 std::string DatapointComponent::get_optolink_state_() { return optolink_->get_state(); }
 
-void DatapointComponent::subscribe_hass_(const std::string entity_id, std::function<void(std::string)> f) {
+void DatapointComponent::subscribe_hass_(const std::string &entity_id, const std::function<void(std::string)> &f) {
   for (auto &subscription : hass_subscriptions_) {
     if (subscription.entity_id == entity_id) {
       subscription.callbacks.push_back(f);
diff --git a/esphome/components/optolink/datapoint_component.h b/esphome/components/optolink/datapoint_component.h
index 5eb751e10b..acc591738e 100644
--- a/esphome/components/optolink/datapoint_component.h
+++ b/esphome/components/optolink/datapoint_component.h
@@ -55,7 +55,7 @@ class DatapointComponent {
   void set_optolink_state_(const char *format, ...);
   std::string get_optolink_state_();
 
-  void subscribe_hass_(const std::string entity_id, std::function<void(std::string)> f);
+  void subscribe_hass_(const std::string &entity_id, const std::function<void(std::string)> &f);
 
  private:
   const size_t max_retries_until_reset_ = 10;
diff --git a/esphome/components/optolink/text_sensor/optolink_text_sensor.cpp b/esphome/components/optolink/text_sensor/optolink_text_sensor.cpp
index ed8779132c..d146871e23 100644
--- a/esphome/components/optolink/text_sensor/optolink_text_sensor.cpp
+++ b/esphome/components/optolink/text_sensor/optolink_text_sensor.cpp
@@ -23,7 +23,7 @@ bool check_time_values(const Time &time) {
   return (time.hours >= 0 && time.hours <= 23) && (time.minutes >= 0 && time.minutes <= 59);
 }
 
-uint8_t *encode_time_string(const std::string input) {
+uint8_t *encode_time_string(const std::string &input) {
   char buffer[49];
   strncpy(buffer, input.c_str(), sizeof(buffer));
   buffer[sizeof(buffer) - 1] = 0x00;