diff --git a/himbaechel/uarch/gatemate/bitstream.cc b/himbaechel/uarch/gatemate/bitstream.cc
index 23f49805..30859430 100644
--- a/himbaechel/uarch/gatemate/bitstream.cc
+++ b/himbaechel/uarch/gatemate/bitstream.cc
@@ -347,6 +347,7 @@ struct BitstreamBackend
                 dict<IdString, Property> params = cell.second->params;
                 Loc l = ctx->getBelLocation(cell.second->bel);
                 params.erase(id_L2T4_UPPER);
+                params.erase(id_MULT_INVERT);
                 int c_i1 = int_or_default(params, id_C_I1, 0);
                 int c_i2 = int_or_default(params, id_C_I2, 0);
                 int c_i3 = int_or_default(params, id_C_I3, 0);
diff --git a/himbaechel/uarch/gatemate/constids.inc b/himbaechel/uarch/gatemate/constids.inc
index d68a5196..11140382 100644
--- a/himbaechel/uarch/gatemate/constids.inc
+++ b/himbaechel/uarch/gatemate/constids.inc
@@ -2272,3 +2272,4 @@ X(CPE_LATCH)
 X(L2T4_UPPER)
 X(CPE_MX8)
 X(CPE_BRIDGE)
+X(MULT_INVERT)
diff --git a/himbaechel/uarch/gatemate/pack_mult.cc b/himbaechel/uarch/gatemate/pack_mult.cc
index 7bae5514..b8dc36e6 100644
--- a/himbaechel/uarch/gatemate/pack_mult.cc
+++ b/himbaechel/uarch/gatemate/pack_mult.cc
@@ -516,6 +516,7 @@ void GateMatePacker::pack_mult()
         for (int i = 0; i < (a_width / 2); i++) {
             auto *mult_lower = create_cell_ptr(id_CPE_LT_L, ctx->idf("%s$row%d$mult_lower", name.c_str(ctx), i));
             auto *mult_upper = create_cell_ptr(id_CPE_LT_U, ctx->idf("%s$row%d$mult_upper", name.c_str(ctx), i));
+            mult_lower->params[id_MULT_INVERT] = Property(is_even_x ? Property::State::S0 : Property::State::S1);
 
             col.mults.push_back(MultCell{mult_lower, mult_upper, name, i == ((a_width / 2) - 1)});
             uarch->multipliers.push_back(mult_lower);