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-rw-r--r--src/nvim/optionstr.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/nvim/optionstr.c b/src/nvim/optionstr.c
index 83bbf0ba33..0c9d428ce7 100644
--- a/src/nvim/optionstr.c
+++ b/src/nvim/optionstr.c
@@ -1034,7 +1034,7 @@ char *did_set_string_option(int opt_idx, char **varp, char *oldval, char *errbuf
if (errbuf != NULL) {
vim_snprintf(errbuf, errbuflen,
_("E526: Missing number after <%s>"),
- transchar_byte(*(s - 1)));
+ transchar_byte((uint8_t)(*(s - 1))));
errmsg = errbuf;
} else {
errmsg = "";