diff --git a/src/state.c b/src/state.c
index d3be618f1..0ba6db6ce 100644
--- a/src/state.c
+++ b/src/state.c
@@ -4,7 +4,6 @@
 ** See Copyright Notice in mruby.h
 */
 
-#include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 #include <mruby.h>