diff --git a/esphome/components/logger/logger.h b/esphome/components/logger/logger.h
index 3031d8a36d..117e9d54d0 100644
--- a/esphome/components/logger/logger.h
+++ b/esphome/components/logger/logger.h
@@ -184,7 +184,7 @@ class Logger : public Component {
 
  protected:
   void process_messages_();
-  void write_msg_(const char *msg);
+  void write_msg_(const char *msg, size_t len);
 
   // Format a log message with printf-style arguments and write it to a buffer with header, footer, and null terminator
   // It's the caller's responsibility to initialize buffer_at (typically to 0)