1 files changed, 3 insertions, 0 deletions

diff --git a/st.c b/st.c
index 0d35613..6f846a6 100644
--- a/st.c
+++ b/st.c
@@ -1221,6 +1221,9 @@ tsetchar(Rune u, Glyph *attr, int x, int y)
         term.dirty[y] = 1;
         term.line[y][x] = *attr;
         term.line[y][x].u = u;
+
+        if (isboxdraw(u))
+                term.line[y][x].mode |= ATTR_BOXDRAW;
 }
 
 void