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-rw-r--r--passes/opt/opt_expr.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/passes/opt/opt_expr.cc b/passes/opt/opt_expr.cc
index 649ad83a6..8aae1a731 100644
--- a/passes/opt/opt_expr.cc
+++ b/passes/opt/opt_expr.cc
@@ -604,7 +604,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
if (cell->type.in(ID($xnor), ID($_XNOR_))) {
cover("opt.opt_expr.const_xnor");
// For consistency since simplemap does $xnor -> $_XOR_ + $_NOT_
- int width = cell->getParam(ID::Y_WIDTH).as_int();
+ int width = GetSize(cell->getPort(ID::Y));
replace_cell(assign_map, module, cell, "const_xnor", ID::Y, SigSpec(RTLIL::State::S1, width));
goto next_cell;
}