diff --git a/rasterization-practical-implementation/geometry.h b/rasterization-practical-implementation/geometry.h
index 471d0d1..6049054 100644
--- a/rasterization-practical-implementation/geometry.h
+++ b/rasterization-practical-implementation/geometry.h
@@ -33,6 +33,7 @@
 #include <iostream>
 #include <iomanip>
 #include <cmath>
+#include <cstdint>
 
 template<typename T>
 class Vec2