diff --git a/esphome/core/bytebuffer.h b/esphome/core/bytebuffer.h
index 462da4c1f1..4662195fb4 100644
--- a/esphome/core/bytebuffer.h
+++ b/esphome/core/bytebuffer.h
@@ -30,6 +30,8 @@ enum Endian { LITTLE, BIG };
  * data from a buffer after it has been written.
  *
  */
+
+class ByteBuffer;
 class ByteBuffer {
  public:
   // Default constructor (compatibility with TEMPLATABLE_VALUE)
@@ -143,6 +145,11 @@ class ByteBuffer {
     return changed;
   }
 
+  ByteBuffer &operator[](size_t idx) {
+    this->set_position(idx);
+    return *this;
+  }
+
  protected:
   ByteBuffer(std::vector<uint8_t> const &data) : data_(data), limit_(data.size()) {}
   void update_() {