diff --git a/Include/ucnhash.h b/Include/ucnhash.h
new file mode 100644
index 00000000000..f27a16fbc98
--- /dev/null
+++ b/Include/ucnhash.h
@@ -0,0 +1,20 @@
+
+#include <Python.h>
+#include <stdlib.h>
+
+/* --- C API ----------------------------------------------------*/
+/* C API for usage by other Python modules */
+typedef struct _Py_UCNHashAPI
+{
+    unsigned long cKeys;
+    unsigned long cchMax;
+    unsigned long (*hash)(const char *key, unsigned int cch);
+    const void *(*getValue)(unsigned long iKey);
+} _Py_UCNHashAPI;
+
+typedef struct 
+{
+    const char *pszUCN;
+    unsigned int uiValue;
+} _Py_UnicodeCharacterName;
+