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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 c13184025..68d6ea82b 100644
--- a/passes/opt/opt_expr.cc
+++ b/passes/opt/opt_expr.cc
@@ -31,7 +31,7 @@ PRIVATE_NAMESPACE_BEGIN
bool did_something;
-void replace_undriven(RTLIL::Module *module, const CellTypes& ct)
+void replace_undriven(RTLIL::Module *module, const CellTypes &ct)
{
SigMap sigmap(module);
SigPool driven_signals;