diff --git a/Include/unicodeobject.h b/Include/unicodeobject.h
index 6255dc3..39dfba9 100644
--- a/Include/unicodeobject.h
+++ b/Include/unicodeobject.h
@@ -2008,6 +2008,29 @@
     Py_UCS4 ch       /* Unicode character */
     );
 
+PyAPI_FUNC(int) _PyUnicode_ToLowerFull(
+    Py_UCS4 ch,       /* Unicode character */
+    Py_UCS4 *res
+    );
+
+PyAPI_FUNC(int) _PyUnicode_ToTitleFull(
+    Py_UCS4 ch,       /* Unicode character */
+    Py_UCS4 *res
+    );
+
+PyAPI_FUNC(int) _PyUnicode_ToUpperFull(
+    Py_UCS4 ch,       /* Unicode character */
+    Py_UCS4 *res
+    );
+
+PyAPI_FUNC(int) _PyUnicode_IsCaseIgnorable(
+    const Py_UCS4 ch         /* Unicode character */
+    );
+
+PyAPI_FUNC(int) _PyUnicode_IsCased(
+    const Py_UCS4 ch         /* Unicode character */
+    );
+
 PyAPI_FUNC(int) _PyUnicode_ToDecimalDigit(
     Py_UCS4 ch       /* Unicode character */
     );