diff --git a/Include/Python.h b/Include/Python.h
index 9e140a5..eac9f48 100644
--- a/Include/Python.h
+++ b/Include/Python.h
@@ -137,6 +137,7 @@
 #include "pyctype.h"
 #include "pystrtod.h"
 #include "pystrcmp.h"
+#include "dtoa.h"
 
 /* _Py_Mangle is defined in compile.c */
 PyAPI_FUNC(PyObject*) _Py_Mangle(PyObject *p, PyObject *name);