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-rw-r--r--Python/ast.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/Python/ast.c b/Python/ast.c
index 6989965efa..a6cc0f7e04 100644
--- a/Python/ast.c
+++ b/Python/ast.c
@@ -4147,7 +4147,7 @@ decode_utf8(struct compiling *c, const char **sPtr, const char *end)
static int
warn_invalid_escape_sequence(struct compiling *c, const node *n,
- char first_invalid_escape_char)
+ unsigned char first_invalid_escape_char)
{
PyObject *msg = PyUnicode_FromFormat("invalid escape sequence \\%c",
first_invalid_escape_char);