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-rw-r--r--src/nvim/eval/vars.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/nvim/eval/vars.c b/src/nvim/eval/vars.c
index 463313efd8..206df03381 100644
--- a/src/nvim/eval/vars.c
+++ b/src/nvim/eval/vars.c
@@ -864,7 +864,7 @@ static int do_unlet_var(lval_T *lp, char *name_end, exarg_T *eap, int deep FUNC_
int cc;
if (lp->ll_tv == NULL) {
- cc = (char_u)(*name_end);
+ cc = (uint8_t)(*name_end);
*name_end = NUL;
// Environment variable, normal name or expanded name.