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-rw-r--r--src/nvim/charset.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/nvim/charset.c b/src/nvim/charset.c
index f4882e57e1..97aac67627 100644
--- a/src/nvim/charset.c
+++ b/src/nvim/charset.c
@@ -1500,7 +1500,7 @@ void vim_str2nr(const char_u *const start, int *const prep, int *const len, cons
} else if ((what & (STR2NR_HEX | STR2NR_OCT | STR2NR_OOCT | STR2NR_BIN))
&& !STRING_ENDED(ptr + 1) && ptr[0] == '0' && ptr[1] != '8'
&& ptr[1] != '9') {
- pre = ptr[1];
+ pre = (char_u)ptr[1];
// Detect hexadecimal: 0x or 0X followed by hex digit.
if ((what & STR2NR_HEX)
&& !STRING_ENDED(ptr + 2)