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-rw-r--r--Modules/binascii.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/Modules/binascii.c b/Modules/binascii.c
index 1f9ff5a..1af6b7f 100644
--- a/Modules/binascii.c
+++ b/Modules/binascii.c
@@ -372,7 +372,7 @@ binascii_b2a_uu_impl(PyObject *module, Py_buffer *data, int backtick)
if (backtick && !bin_len)
*ascii_data++ = '`';
else
- *ascii_data++ = ' ' + bin_len;
+ *ascii_data++ = ' ' + (unsigned char)bin_len;
for( ; bin_len > 0 || leftbits != 0 ; bin_len--, bin_data++ ) {
/* Shift the data (or padding) into our buffer */