diff --git a/src/ngx_message_handler.h b/src/ngx_message_handler.h
index 2308fb9b0..78ccfc92e 100644
--- a/src/ngx_message_handler.h
+++ b/src/ngx_message_handler.h
@@ -18,6 +18,10 @@
 #define NGX_MESSAGE_HANDLER_H_
 
 extern "C" {
+  #include <ngx_auto_config.h>
+#if (NGX_THREADS)
+  #include <ngx_thread.h>
+#endif
   #include <ngx_core.h>
   #include <ngx_log.h>
 }
diff --git a/src/ngx_rewrite_driver_factory.h b/src/ngx_rewrite_driver_factory.h
index 51f72da0a..54ff3bf28 100644
--- a/src/ngx_rewrite_driver_factory.h
+++ b/src/ngx_rewrite_driver_factory.h
@@ -20,6 +20,10 @@
 #define NGX_REWRITE_DRIVER_FACTORY_H_
 
 extern "C" {
+  #include <ngx_auto_config.h>
+#if (NGX_THREADS)
+  #include <ngx_thread.h>
+#endif
   #include <ngx_core.h>
   #include <ngx_http.h>
   #include <ngx_config.h>