diff --git a/button.h b/button.h
index 43d6bef..74976b5 100644
--- a/button.h
+++ b/button.h
@@ -1,5 +1,7 @@
 #pragma once
 
+#include <stdint.h>
+
 struct Button {
   int x, y, w, h;
   unsigned int id;