diff --git a/inc/thorvg.h b/inc/thorvg.h
index 8e3ab4e6..f515a031 100644
--- a/inc/thorvg.h
+++ b/inc/thorvg.h
@@ -1,6 +1,7 @@
 #ifndef _THORVG_H_
 #define _THORVG_H_
 
+#include <cstdint>
 #include <functional>
 #include <memory>
 #include <string>