diff --git a/hld/Eval.hx b/hld/Eval.hx
index 7f00387..15e4cb1 100644
--- a/hld/Eval.hx
+++ b/hld/Eval.hx
@@ -711,7 +711,7 @@ class Eval {
 			return v;
 		}
 		var v = getGlobalAddress(path);
-		if( v == null ) throw "Unknown value "+path.join(".");
+		if( v == null || v == ANone ) throw "Unknown value "+path.join(".");
 		return fetchAddr(v);
 	}