diff --git a/DAEValidator/library/src/DaeValidator.cpp b/DAEValidator/library/src/DaeValidator.cpp
index 715d90340..08070823a 100644
--- a/DAEValidator/library/src/DaeValidator.cpp
+++ b/DAEValidator/library/src/DaeValidator.cpp
@@ -4,6 +4,7 @@
 #include "Strings.h"
 #include "StringUtil.h"
 #include <cmath>
+#include <cstdint>
 #include "no_warning_iomanip"
 #include "no_warning_iostream"
 #include <set>
diff --git a/DAEValidator/library/src/XmlDoc.cpp b/DAEValidator/library/src/XmlDoc.cpp
index 863166a26..c3da60ddc 100644
--- a/DAEValidator/library/src/XmlDoc.cpp
+++ b/DAEValidator/library/src/XmlDoc.cpp
@@ -1,5 +1,6 @@
 #include "Macros.h"
 
+#include <cstdint>
 #if IS_GNUC_AND_GNUC_VERSION_LT(5,1,1)
 #include <cstring>
 #endif