1 files changed, 1 insertions, 1 deletions
diff --git a/tmux.h b/tmux.h
index 5cd5132b..a61040b6 100644
--- a/tmux.h
+++ b/tmux.h
@@ -516,7 +516,7 @@ struct grid_cell {
 } __packed;
 
 /* Grid cell UTF-8 data. Used instead of data in grid_cell for UTF-8 cells. */
-#define UTF8_SIZE 8
+#define UTF8_SIZE 9
 struct grid_utf8 {
 	u_char	width;
 	u_char	data[UTF8_SIZE];