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-rw-r--r--src/nvim/sign.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/nvim/sign.c b/src/nvim/sign.c
index d0c093d93a..00e282b76e 100644
--- a/src/nvim/sign.c
+++ b/src/nvim/sign.c
@@ -103,7 +103,7 @@ static signgroup_T *sign_group_ref(const char *groupname)
hi = hash_lookup(&sg_table, (char *)groupname, strlen(groupname), hash);
if (HASHITEM_EMPTY(hi)) {
// new group
- group = xmalloc(sizeof(signgroup_T) + strlen(groupname));
+ group = xmalloc(offsetof(signgroup_T, sg_name) + strlen(groupname) + 1);
STRCPY(group->sg_name, groupname);
group->sg_refcount = 1;