diff --git a/esphome/components/api/api_frame_helper_noise.cpp b/esphome/components/api/api_frame_helper_noise.cpp
index 65f16ab3c8..4a9257231d 100644
--- a/esphome/components/api/api_frame_helper_noise.cpp
+++ b/esphome/components/api/api_frame_helper_noise.cpp
@@ -371,6 +371,7 @@ void APINoiseFrameHelper::send_explicit_handshake_reject_(const LogString *reaso
   const char *reason_str = LOG_STR_ARG(reason);
   size_t reason_len = strlen(reason_str);
   if (reason_len > 0) {
+    // NOLINTNEXTLINE(bugprone-not-null-terminated-result) - binary protocol, not a C string
     std::memcpy(data + 1, reason_str, reason_len);
   }
 #endif