diff --git a/src/ngx_coolkit_handlers.h b/src/ngx_coolkit_handlers.h
index 430c0bf..f58c334 100644
--- a/src/ngx_coolkit_handlers.h
+++ b/src/ngx_coolkit_handlers.h
@@ -27,6 +27,7 @@
 #ifndef _NGX_COOLKIT_HANDLERS_H_
 #define _NGX_COOLKIT_HANDLERS_H_
 
+#include <ngx_config.h>
 #include <ngx_core.h>
 #include <ngx_http.h>
 
diff --git a/src/ngx_coolkit_module.h b/src/ngx_coolkit_module.h
index f0d8f8f..7419f21 100644
--- a/src/ngx_coolkit_module.h
+++ b/src/ngx_coolkit_module.h
@@ -27,6 +27,7 @@
 #ifndef _NGX_COOLKIT_MODULE_H_
 #define _NGX_COOLKIT_MODULE_H_
 
+#include <ngx_config.h>
 #include <nginx.h>
 #include <ngx_core.h>
 #include <ngx_http.h>