diff --git a/Objects/unicodectype.c b/Objects/unicodectype.c
index b21fd35a4a4..a572c12bcc8 100644
--- a/Objects/unicodectype.c
+++ b/Objects/unicodectype.c
@@ -65,6 +65,8 @@ Py_UCS4 _PyUnicode_ToTitlecase(register Py_UCS4 ch)
 {
     const _PyUnicode_TypeRecord *ctype = gettyperecord(ch);
 
+    if (ctype->flags & EXTENDED_CASE_MASK)
+        return _PyUnicode_ExtendedCase[ctype->title & 0xFFFF];
     return ch + ctype->title;
 }