diff --git a/lib/resource-1.0/mathematical/PredicationI.gf b/lib/resource-1.0/mathematical/PredicationI.gf
index cb969e7c9..6d9cf78d7 100644
--- a/lib/resource-1.0/mathematical/PredicationI.gf
+++ b/lib/resource-1.0/mathematical/PredicationI.gf
@@ -1,5 +1,7 @@
 incomplete concrete PredicationI of Predication = Cat ** open ParamX, Lang in {
 
+flags optimize = all_subs ;
+
 lincat
   AS = {s : Polarity => S} ;
 
diff --git a/lib/resource-1.0/multimodal/DemonstrativeI.gf b/lib/resource-1.0/multimodal/DemonstrativeI.gf
index e43ecdbbd..722c03d42 100644
--- a/lib/resource-1.0/multimodal/DemonstrativeI.gf
+++ b/lib/resource-1.0/multimodal/DemonstrativeI.gf
@@ -1,6 +1,8 @@
 incomplete concrete DemonstrativeI of Demonstrative = Cat **
   open Prelude, Lang, ParamX, DemRes in {
 
+  flags optimize = all_subs ;
+
   lincat
 
     MS     = Dem {s : Polarity => Str} ;