diff --git a/ASTree.cpp b/ASTree.cpp
index 5d8b8a6..d1baadd 100644
--- a/ASTree.cpp
+++ b/ASTree.cpp
@@ -1,4 +1,5 @@
 #include <cstring>
+#include <cstdint>
 #include "ASTree.h"
 #include "FastStack.h"
 #include "pyc_numeric.h"
diff --git a/bytecode.cpp b/bytecode.cpp
index b96c33d..1a6acad 100644
--- a/bytecode.cpp
+++ b/bytecode.cpp
@@ -1,6 +1,7 @@
 #include "pyc_numeric.h"
 #include "bytecode.h"
 #include <stdexcept>
+#include <cstdint>
 #include <cmath>
 
 #ifdef _MSC_VER