diff --git a/xc7/arch.h b/xc7/arch.h
index 9d8c4251..092cd5f6 100644
--- a/xc7/arch.h
+++ b/xc7/arch.h
@@ -677,6 +677,11 @@ struct Arch : BaseCtx
         return wire_to_net[wire.index];
     }
 
+    WireId getConflictingWireWire(WireId wire) const
+    {
+        return wire;
+    }
+
     NetInfo *getConflictingWireNet(WireId wire) const
     {
         NPNR_ASSERT(wire != WireId());
@@ -773,6 +778,11 @@ struct Arch : BaseCtx
         return pip_to_net[pip.index];
     }
 
+    WireId getConflictingPipWire(PipId pip) const
+    {
+        return WireId();
+    }
+
     NetInfo *getConflictingPipNet(PipId pip) const
     {
         NPNR_ASSERT(pip != PipId());