diff --git a/esphome/components/microphone/microphone.h b/esphome/components/microphone/microphone.h
index 883ca97710..914ad80bea 100644
--- a/esphome/components/microphone/microphone.h
+++ b/esphome/components/microphone/microphone.h
@@ -1,6 +1,6 @@
 #pragma once
 
-#include <stddef.h>
+#include <cstddef>
 #include <cstdint>
 #include <functional>
 #include <vector>
diff --git a/esphome/components/speaker/speaker.h b/esphome/components/speaker/speaker.h
index 193049402d..375ccc4e8c 100644
--- a/esphome/components/speaker/speaker.h
+++ b/esphome/components/speaker/speaker.h
@@ -1,6 +1,6 @@
 #pragma once
 
-#include <stddef.h>
+#include <cstddef>
 #include <cstdint>
 #include <vector>