diff --git a/wip-hugo/routines/triangle/triangle.inc b/wip-hugo/routines/triangle/triangle.inc
index 779abea..a475aa7 100644
--- a/wip-hugo/routines/triangle/triangle.inc
+++ b/wip-hugo/routines/triangle/triangle.inc
@@ -17,7 +17,7 @@ BC = $E3
 V_l = $E2    ;16-bit value (uses E3)
 V_r = $E0    ;16-bit value (used E1)
 dy_2_l = $DE ;16-bit value (used DF)
-dy_2_l = $DC ;16-bit value (used DD)
+dy_2_r = $DC ;16-bit value (used DD)
 D_l = $DA    ;16-bit value (uses DB)
 D_r = $D8    ;16-bit value (uses D9)