diff --git a/holly/framebuffer.hpp b/holly/framebuffer.hpp
index 6f70d41..3d15b86 100644
--- a/holly/framebuffer.hpp
+++ b/holly/framebuffer.hpp
@@ -1,5 +1,7 @@
 #pragma once
 
+#include <stdint.h>
+
 namespace framebuffer {
 
   constexpr inline int div32(int n)