diff --git a/src/bin/exrcheck/main.cpp b/src/bin/exrcheck/main.cpp
index d9812e479d..198ebfe915 100644
--- a/src/bin/exrcheck/main.cpp
+++ b/src/bin/exrcheck/main.cpp
@@ -4,6 +4,8 @@
 #include <ImfCheckFile.h>
 #include <ImathConfig.h>
 
+#include <cstdint>
+#include <fstream>
 #include <iostream>
 #include <fstream>
 #include <string.h>
diff --git a/src/lib/OpenEXR/ImfDeepTiledInputFile.h b/src/lib/OpenEXR/ImfDeepTiledInputFile.h
index b01330f3b3..109bd65ece 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 e5f950a931..130153ac68 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
diff --git a/src/lib/OpenEXR/ImfTiledMisc.h b/src/lib/OpenEXR/ImfTiledMisc.h
index 9059ae2c70..9c016148d0 100644
--- a/src/lib/OpenEXR/ImfTiledMisc.h
+++ b/src/lib/OpenEXR/ImfTiledMisc.h
@@ -19,7 +19,7 @@
 
 #include <stdio.h>
 #include <vector>
-
+#include <cstdint>
 
 OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER