1 files changed, 1 insertions, 1 deletions
diff --git a/machxo2/arch.h b/machxo2/arch.h
index ddcb9264..489a44ab 100644
--- a/machxo2/arch.h
+++ b/machxo2/arch.h
@@ -643,7 +643,7 @@ struct Arch : BaseArch<ArchRanges>
     bool route() override;
 
     // Placer
-    bool isBelLocationValid(BelId bel) const override;
+    bool isBelLocationValid(BelId bel, bool explain_invalid = false) const override;
 
     static const std::string defaultPlacer;
     static const std::vector<std::string> availablePlacers;