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-rw-r--r--frontends/ast/genrtlil.cc4
1 files changed, 2 insertions, 2 deletions
diff --git a/frontends/ast/genrtlil.cc b/frontends/ast/genrtlil.cc
index 791ee986..a9574254 100644
--- a/frontends/ast/genrtlil.cc
+++ b/frontends/ast/genrtlil.cc
@@ -1007,8 +1007,8 @@ RTLIL::SigSpec AstNode::genRTLIL(int width_hint, bool sign_hint)
int width = std::max(val1.width, val2.width);
is_signed = children[1]->is_signed && children[2]->is_signed;
- val1.extend(width);
- val2.extend(width);
+ val1.extend(width, is_signed);
+ val2.extend(width, is_signed);
return mux2rtlil(this, cond, val1, val2);
}