diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 3bf19328bc5..70728f840ca 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -9891,8 +9891,8 @@ PyUnicode_Join(PyObject *separator, PyObject *seq)
             Py_UCS4 * to_ = (Py_UCS4 *)((data)) + (start); \
             for (; i_ < (length); ++i_, ++to_) *to_ = (value); \
             break; \
-        default: assert(0); \
         } \
+        default: assert(0); \
         } \
     } while (0)