1 files changed, 3 insertions, 3 deletions
diff --git a/passes/techmap/extract.cc b/passes/techmap/extract.cc
index 1687a1ffb..e5055c9c4 100644
--- a/passes/techmap/extract.cc
+++ b/passes/techmap/extract.cc
@@ -755,11 +755,11 @@ struct ExtractPass : public Pass {
 					newCell->type = cell->type;
 					newCell->parameters = cell->parameters;
 					for (auto &conn : cell->connections) {
-						RTLIL::SigSpec sig = sigmap(conn.second);
-						for (auto &chunk : sig.chunks_rw())
+						std::vector<RTLIL::SigChunk> chunks = sigmap(conn.second);
+						for (auto &chunk : chunks)
 							if (chunk.wire != NULL)
 								chunk.wire = newMod->wires.at(chunk.wire->name);
-						newCell->connections[conn.first] = sig;
+						newCell->connections[conn.first] = chunks;
 					}
 					newMod->add(newCell);
 				}