diff --git a/hb.c b/hb.c
index 38214c2..f222445 100644
--- a/hb.c
+++ b/hb.c
@@ -89,6 +89,13 @@ hbtransform(XftGlyphFontSpec *specs, const Glyph *glyphs, size_t len, int x, int
 		if (glyphs[i].mode & ATTR_WDUMMY)
 			continue;
 
+		#if BOXDRAW_PATCH
+		if (glyphs[i].mode & ATTR_BOXDRAW) {
+			specidx++;
+			continue;
+		}
+		#endif
+
 		if (codepoints[i] != specs[specidx].glyph)
 			((Glyph *)glyphs)[i].mode |= ATTR_LIGA;