diff --git a/esphome/core/time.h b/esphome/core/time.h
index 874f0db4b4..1716c51ffd 100644
--- a/esphome/core/time.h
+++ b/esphome/core/time.h
@@ -1,5 +1,7 @@
 #pragma once
 
+#include "esphome/core/defines.h"
+
 #include <cstdint>
 #include <cstdlib>
 #include <cstring>