diff --git a/sapfor/experts/Sapfor_2017/_src/Utils/utils.h b/sapfor/experts/Sapfor_2017/_src/Utils/utils.h
index df8e325..d46a9db 100644
--- a/sapfor/experts/Sapfor_2017/_src/Utils/utils.h
+++ b/sapfor/experts/Sapfor_2017/_src/Utils/utils.h
@@ -3,6 +3,7 @@
 #include <vector>
 #include <set>
 #include <string>
+#include <cstdint>
 
 struct DataDirective;
 namespace Distribution