1 files changed, 2 insertions, 0 deletions
diff --git a/ice40/place_legaliser.cc b/ice40/place_legaliser.cc
index ebcc0da7..3c82a1bd 100644
--- a/ice40/place_legaliser.cc
+++ b/ice40/place_legaliser.cc
@@ -372,6 +372,7 @@ class PlacementLegaliser
         NPNR_ASSERT(ctx->nets.find(co_i3_name) == ctx->nets.end());
         ctx->nets[co_i3_name] = std::move(co_i3_net);
         IdString name = lc->name;
+        ctx->assignCellArgs(lc.get());
         ctx->cells[lc->name] = std::move(lc);
         createdCells.insert(name);
         return ctx->cells[name].get();
@@ -416,6 +417,7 @@ class PlacementLegaliser
         ctx->nets[out_net_name] = std::move(out_net);
 
         IdString name = lc->name;
+        ctx->assignCellArgs(lc.get());
         ctx->cells[lc->name] = std::move(lc);
         createdCells.insert(name);
         return ctx->cells[name].get();