diff --git a/src/bin/exrcheck/main.cpp b/src/bin/exrcheck/main.cpp
index d9812e4..ac995af 100644
--- a/src/bin/exrcheck/main.cpp
+++ b/src/bin/exrcheck/main.cpp
@@ -4,6 +4,7 @@
 #include <ImfCheckFile.h>
 #include <ImathConfig.h>
 
+#include <cstdint>
 #include <iostream>
 #include <fstream>
 #include <string.h>
diff --git a/src/lib/OpenEXR/ImfDeepTiledInputFile.h b/src/lib/OpenEXR/ImfDeepTiledInputFile.h
index b01330f..109bd65 100644
--- a/src/lib/OpenEXR/ImfDeepTiledInputFile.h
+++ b/src/lib/OpenEXR/ImfDeepTiledInputFile.h
@@ -19,6 +19,7 @@
 
 #include "ImfTileDescription.h"
 
+#include <cstdint>
 #include <ImathBox.h>
 
 OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER
diff --git a/src/lib/OpenEXR/ImfDeepTiledInputPart.h b/src/lib/OpenEXR/ImfDeepTiledInputPart.h
index e5f950a..130153a 100644
--- a/src/lib/OpenEXR/ImfDeepTiledInputPart.h
+++ b/src/lib/OpenEXR/ImfDeepTiledInputPart.h
@@ -10,6 +10,7 @@
 
 #include "ImfTileDescription.h"
 
+#include <cstdint>
 #include <ImathBox.h>
 
 OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER