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-rw-r--r--src/nvim/highlight_group.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/nvim/highlight_group.c b/src/nvim/highlight_group.c
index de53545195..60cafb0abb 100644
--- a/src/nvim/highlight_group.c
+++ b/src/nvim/highlight_group.c
@@ -1942,7 +1942,7 @@ static int syn_add_group(const char *name, size_t len)
if (!vim_isprintc(c)) {
emsg(_("E669: Unprintable character in group name"));
return 0;
- } else if (!ASCII_ISALNUM(c) && c != '_' && c != '.' && c != '@') {
+ } else if (!ASCII_ISALNUM(c) && c != '_' && c != '.' && c != '@' && c != '-') {
// '.' and '@' are allowed characters for use with treesitter capture names.
msg_source(HL_ATTR(HLF_W));
emsg(_(e_highlight_group_name_invalid_char));