diff --git a/himbaechel/uarch/gatemate/route_mult.cc b/himbaechel/uarch/gatemate/route_mult.cc
index 10e9b401..ac5fcbb5 100644
--- a/himbaechel/uarch/gatemate/route_mult.cc
+++ b/himbaechel/uarch/gatemate/route_mult.cc
@@ -243,7 +243,7 @@ void route_mult_x1y2_lower(Context *ctx, NetInfo *net, CellInfo *lower, Loc loc,
         auto sb_big_d2_1 = ctx->getWireByName(IdStringList::concat(x4y1, ctx->idf("SB_BIG.P05.D2_1")));
         auto sb_big_y1 = ctx->getWireByName(IdStringList::concat(x4y1, ctx->idf("SB_BIG.P05.Y1")));
         auto sb_big_ydiag = ctx->getWireByName(IdStringList::concat(x4y1, ctx->idf("SB_BIG.P05.YDIAG")));
-        // x2y1/IM.P05.D2 is x4y1/SB_BIG.P05.Y3
+        auto sb_big_y3 = ctx->getWireByName(IdStringList::concat(x4y1, ctx->idf("SB_BIG.P05.Y3")));
 
         find_and_bind_downhill_pip(ctx, cpe_out1, sb_sml_p06_d0, net);
         find_and_bind_downhill_pip(ctx, sb_sml_p06_d0, sb_sml_p06_y1_int, net);
@@ -256,7 +256,8 @@ void route_mult_x1y2_lower(Context *ctx, NetInfo *net, CellInfo *lower, Loc loc,
         find_and_bind_downhill_pip(ctx, sb_sml_p05_y1, sb_big_d2_1, net);
         find_and_bind_downhill_pip(ctx, sb_big_d2_1, sb_big_y1, net);
         find_and_bind_downhill_pip(ctx, sb_big_y1, sb_big_ydiag, net);
-        find_and_bind_downhill_pip(ctx, sb_big_ydiag, in_mux, net);
+        find_and_bind_downhill_pip(ctx, sb_big_ydiag, sb_big_y3, net);
+        find_and_bind_downhill_pip(ctx, sb_big_y3, in_mux, net);
     } else {
         auto sb_big_p06_d0 = ctx->getWireByName(IdStringList::concat(x2y1, ctx->idf("SB_BIG.P06.D0")));
         auto sb_big_p06_y1 = ctx->getWireByName(IdStringList::concat(x2y1, ctx->idf("SB_BIG.P06.Y1")));