diff --git a/esphome/components/optolink/helpers.cpp b/esphome/components/optolink/helpers.cpp
index a25cb0f543..08e4c03f5d 100644
--- a/esphome/components/optolink/helpers.cpp
+++ b/esphome/components/optolink/helpers.cpp
@@ -2,7 +2,7 @@
 
 #include "helpers.h"
 #include "esphome/core/log.h"
-#include <string.h>
+#include <cstring>
 
 namespace esphome {
 namespace optolink {
@@ -23,7 +23,7 @@ void rtrim(std::string &s) {
   s.erase(p, s.end());
 }
 
-std::string decode_day_schedule(uint8_t *input) {
+std::string decode_day_schedule(const uint8_t *input) {
   char buffer[49];
   for (int i = 0; i < 8; i++) {
     int hour = input[i] >> 3;
diff --git a/esphome/components/optolink/text/optolink_text.h b/esphome/components/optolink/text/optolink_text.h
index 3c2b12c161..42e8d6aa52 100644
--- a/esphome/components/optolink/text/optolink_text.h
+++ b/esphome/components/optolink/text/optolink_text.h
@@ -21,7 +21,7 @@ class OptolinkText : public DatapointComponent, public esphome::text::Text, publ
  protected:
   void setup() override;
   void update() override { datapoint_read_request_(); }
-  void control(const std::string &value);
+  void control(const std::string &value) override;
 
   const StringRef &get_component_name() override { return get_name(); }
   void datapoint_value_changed(uint8_t *value, size_t length) override;