diff --git a/include/internal/cef_logging_internal.h b/include/internal/cef_logging_internal.h
index c376d0526..598263d16 100644
--- a/include/internal/cef_logging_internal.h
+++ b/include/internal/cef_logging_internal.h
@@ -31,6 +31,8 @@
 #define CEF_INCLUDE_INTERNAL_CEF_LOGGING_INTERNAL_H_
 #pragma once
 
+#include <stddef.h>
+
 #include "include/internal/cef_export.h"
 
 #ifdef __cplusplus