diff --git a/src/gsCore/gsSysInfo.h b/src/gsCore/gsSysInfo.h
index 6d2fa9e..27188f7 100644
--- a/src/gsCore/gsSysInfo.h
+++ b/src/gsCore/gsSysInfo.h
@@ -13,6 +13,7 @@
 
 #pragma once
 
+#include <cstdint>
 #include <gsCore/gsForwardDeclarations.h>
 
 namespace gismo