diff --git a/src/www/gfse/editor.js b/src/www/gfse/editor.js
index 72999ce72..18782b91f 100644
--- a/src/www/gfse/editor.js
+++ b/src/www/gfse/editor.js
@@ -366,7 +366,7 @@ function draw_startcat(g) {
     function opt(cat) { return option(cat,cat); }
     var opts = g.extends && g.extends.length>0 ? [opt("-")] : [];
     var dc=defined_cats(g);
-    for(var cat in dc) opts.push(opt(cat));
+    for(var cat in dc) if(dc[cat]!="Predef") opts.push(opt(cat));
     var m = node("select",{},opts);
     m.value=startcat;
     m.onchange=function() { 
@@ -1096,7 +1096,9 @@ function draw_lins(g,ci) {
 
 function defined_cats(g) { return all_defined_cats(g,inherited_grammars(g)) }
 function defined_funs(g) { return all_defined_funs(g,inherited_gramamrs(g)) }
-function inherited_cats(g) {return all_inherited_cats(inherited_grammars(g),{})}
+function inherited_cats(g) {
+    return all_inherited_cats(inherited_grammars(g),predefined_cats())
+}
 function inherited_funs(g) {return all_inherited_funs(inherited_grammars(g),{})}
 
 function upload(g,cont) {
diff --git a/src/www/gfse/gf_abs.js b/src/www/gfse/gf_abs.js
index 2530a20db..e49837b7a 100644
--- a/src/www/gfse/gf_abs.js
+++ b/src/www/gfse/gf_abs.js
@@ -29,18 +29,24 @@ type Lhs = String -- name and type of oper,
 type Term = String -- arbitrary GF term (not parsed by the editor)
 */
 
-// locally_defined_cats :: Grammar -> {Cat=>Bool} -> {Cat=>Bool} // destr upd
+// locally_defined_cats :: Grammar -> {Cat=>ModId} -> {Cat=>ModId} // destr upd
 function locally_defined_cats(g,dc) {
     with(g.abstract)
 	for(var i in cats) dc[cats[i]]=g.basename;
     return dc;
 }
 
-// all_defined_cats :: Grammar -> [Grammar] -> {Cat=>Bool}
-function all_defined_cats(g,igs) {
-    return all_inherited_cats(igs,locally_defined_cats(g,{}))
+// predefined_cats :: () -> {Cat=>ModId}
+function predefined_cats() {
+    var pd = "Predef"
+    return { "Int":pd, "Float":pd, "String":pd}
 }
-// all_inherited_cats :: [Grammar] -> {Cat=>Bool} -> {Cat=>Bool} // destr upd
+
+// all_defined_cats :: Grammar -> [Grammar] -> {Cat=>ModId}
+function all_defined_cats(g,igs) {
+    return all_inherited_cats(igs,locally_defined_cats(g,predefined_cats()))
+}
+// all_inherited_cats :: [Grammar] -> {Cat=>ModId} -> {Cat=>ModId} // destr upd
 function all_inherited_cats(igs,dc) {
     for(var i in igs) dc=locally_defined_cats(igs[i],dc)
     return dc;