diff --git a/mwparserfromhell/parser/tokenizer.h b/mwparserfromhell/parser/tokenizer.h
index 842e65d..102fecd 100644
--- a/mwparserfromhell/parser/tokenizer.h
+++ b/mwparserfromhell/parser/tokenizer.h
@@ -29,12 +29,15 @@ SOFTWARE.
 #include <math.h>
 #include <structmember.h>
 #include <bytesobject.h>
-#include <stdint.h>
 
 #if PY_MAJOR_VERSION >= 3
 #define IS_PY3K
 #endif
 
+#ifndef uint64_t
+#define uint64_t unsigned PY_LONG_LONG
+#endif
+
 #define malloc PyObject_Malloc
 #define free   PyObject_Free