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-rw-r--r--src/nvim/message.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/nvim/message.c b/src/nvim/message.c
index 7f29b19031..3b3dfcd5b6 100644
--- a/src/nvim/message.c
+++ b/src/nvim/message.c
@@ -2514,7 +2514,7 @@ static void store_sb_text(char **sb_str, char *s, int attr, int *sb_col, int fin
}
if (s > *sb_str) {
- mp = xmalloc((sizeof(msgchunk_T) + (size_t)(s - *sb_str)));
+ mp = xmalloc(offsetof(msgchunk_T, sb_text) + (size_t)(s - *sb_str) + 1);
mp->sb_eol = (char)finish;
mp->sb_msg_col = *sb_col;
mp->sb_attr = attr;