diff --git a/OpenEXR/IlmImf/ImfDwaCompressor.cpp b/OpenEXR/IlmImf/ImfDwaCompressor.cpp
index 59d1d5d1..585a3e65 100644
--- a/OpenEXR/IlmImf/ImfDwaCompressor.cpp
+++ b/OpenEXR/IlmImf/ImfDwaCompressor.cpp
@@ -159,6 +159,7 @@
 #include <limits>
 
 #include <cstddef>
+#include <cstdint>
 
 
 // Windows specific addition to prevent the indirect import of the redefined min/max macros
diff --git a/OpenEXR/IlmImf/ImfHuf.cpp b/OpenEXR/IlmImf/ImfHuf.cpp
index 271849b7..165fac58 100644
--- a/OpenEXR/IlmImf/ImfHuf.cpp
+++ b/OpenEXR/IlmImf/ImfHuf.cpp
@@ -53,6 +53,7 @@
 #include <cstring>
 #include <cassert>
 #include <algorithm>
+#include <cstdint>
 
 
 using namespace std;
diff --git a/OpenEXR/IlmImf/ImfMisc.cpp b/OpenEXR/IlmImf/ImfMisc.cpp
index d2c84787..4b487940 100644
--- a/OpenEXR/IlmImf/ImfMisc.cpp
+++ b/OpenEXR/IlmImf/ImfMisc.cpp
@@ -40,6 +40,7 @@
 //
 //-----------------------------------------------------------------------------
 
+#include <cstdint>
 #include <ImfMisc.h>
 #include <ImfHeader.h>
 #include <ImfAttribute.h>