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-rw-r--r--Python/getargs.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/Python/getargs.c b/Python/getargs.c
index 7bc150d..502944d 100644
--- a/Python/getargs.c
+++ b/Python/getargs.c
@@ -257,7 +257,7 @@ vgetargs1(args, format, p_va, compat)
}
}
- if (*format != '\0' && !isalpha(*format) &&
+ if (*format != '\0' && !isalpha((int)(*format)) &&
*format != '(' &&
*format != '|' && *format != ':' && *format != ';') {
PyErr_Format(PyExc_SystemError,