diff --git a/unicodedata2/unicodedata.c b/unicodedata2/unicodedata.c
index 1a95a8c..764e315 100644
--- a/unicodedata2/unicodedata.c
+++ b/unicodedata2/unicodedata.c
@@ -17,7 +17,12 @@
 
 #include "Python.h"
 #ifndef PYPY_VERSION
+#if PY_MINOR_VERSION < 10
 #include "ucnhash.h"
+#else
+#define Py_BUILD_CORE
+#include "internal/pycore_ucnhash.h"
+#endif
 #endif
 #include "structmember.h"
 #include "unicodectype.h"