diff --git a/lib/src/experimental/PredChi.gf b/lib/src/experimental/PredChi.gf
new file mode 100644
index 000000000..e08d08c3c
--- /dev/null
+++ b/lib/src/experimental/PredChi.gf
@@ -0,0 +1,9 @@
+concrete PredChi of Pred = 
+  CatChi [NP,Utt,IP,IAdv,IComp,Conj,RP,RS,Imp] ** 
+    PredFunctor
+    with 
+      (PredInterface = PredInstanceChi) ** open TenseX in {
+
+lincat Ant = {s : Str ; a : Anteriority} ;
+
+}