1 files changed, 3 insertions, 0 deletions

diff --git a/st.c b/st.c
index 83681c1..1a3f49c 100644
--- a/st.c
+++ b/st.c
@@ -1285,6 +1285,9 @@ 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