diff --git a/mysql_duce_ext.c b/mysql_duce_ext.c
index d726301..6a40b2c 100644
--- a/mysql_duce_ext.c
+++ b/mysql_duce_ext.c
@@ -1,4 +1,4 @@
-#include "mysql_ext.h"
+#include "mysql_duce_ext.h"
 
 /* MySQL::Client */
 static VALUE rb_mysql_client_new(VALUE klass) {