1 files changed, 1 insertions, 1 deletions
diff --git a/Objects/bytesobject.c b/Objects/bytesobject.c
index 6a4eb67808..48b6501f7a 100644
--- a/Objects/bytesobject.c
+++ b/Objects/bytesobject.c
@@ -1257,7 +1257,7 @@ PyObject *PyBytes_DecodeEscape(const char *s,
     if (first_invalid_escape != NULL) {
         if (PyErr_WarnFormat(PyExc_DeprecationWarning, 1,
                              "invalid escape sequence '\\%c'",
-                             *first_invalid_escape) < 0) {
+                             (unsigned char)*first_invalid_escape) < 0) {
             Py_DECREF(result);
             return NULL;
         }