diff --git a/lex/lexgen/codegen.go b/lex/lexgen/codegen.go
index 1d7820a8..4a362a2b 100644
--- a/lex/lexgen/codegen.go
+++ b/lex/lexgen/codegen.go
@@ -184,9 +184,6 @@ func (gen *CodeGenerator) fieldType(fname string, def *lexicon.SchemaDef, option
 	// NOTE: SchemaObject and SchemaUnion should be handled outside this function; as well as arrays of those types also count
 	// TODO: another pass to check for type completeness
 	switch v := def.Inner.(type) {
-	case lexicon.SchemaNull:
-		// NOTE: using "any" as a generic 'nil' type
-		return "any", nil
 	case lexicon.SchemaBoolean:
 		if optional {
 			return "*bool", nil
diff --git a/lex/lexgen/flatten.go b/lex/lexgen/flatten.go
index 14e2ec33..37c915d3 100644
--- a/lex/lexgen/flatten.go
+++ b/lex/lexgen/flatten.go
@@ -172,7 +172,7 @@ func (fl *FlatLexicon) flattenType(fd *FlatDef, tpath []string, def *lexicon.Sch
 		}
 		// don't emit the array itself
 		return nil
-	case lexicon.SchemaString, lexicon.SchemaNull, lexicon.SchemaInteger, lexicon.SchemaBoolean, lexicon.SchemaUnknown, lexicon.SchemaBytes:
+	case lexicon.SchemaString, lexicon.SchemaInteger, lexicon.SchemaBoolean, lexicon.SchemaUnknown, lexicon.SchemaBytes:
 		// don't emit
 		// NOTE: might want to emit some string "knownValue" lists in the future?
 	case lexicon.SchemaCIDLink, lexicon.SchemaBlob:
@@ -203,7 +203,7 @@ func (fl *FlatLexicon) flattenObject(fd *FlatDef, tpath []string, obj *lexicon.S
 		tp := slices.Clone(tpath)
 		tp = append(tp, fname)
 		switch v := field.Inner.(type) {
-		case lexicon.SchemaNull, lexicon.SchemaBoolean, lexicon.SchemaInteger, lexicon.SchemaString, lexicon.SchemaBytes:
+		case lexicon.SchemaBoolean, lexicon.SchemaInteger, lexicon.SchemaString, lexicon.SchemaBytes:
 			// no-op
 		case lexicon.SchemaCIDLink, lexicon.SchemaBlob, lexicon.SchemaUnknown:
 			// no-op, but maybe set a flag on def?
diff --git a/lex/lexgen/util.go b/lex/lexgen/util.go
index 0a8e110d..f6770fe4 100644
--- a/lex/lexgen/util.go
+++ b/lex/lexgen/util.go
@@ -25,8 +25,6 @@ func defType(sd *lexicon.SchemaDef) (string, error) {
 		return "permission-set", nil
 	case lexicon.SchemaPermission:
 		return "permission", nil
-	case lexicon.SchemaNull:
-		return "null", nil
 	case lexicon.SchemaBoolean:
 		return "boolean", nil
 	case lexicon.SchemaInteger:
@@ -71,10 +69,8 @@ func defDescription(sd *lexicon.SchemaDef) string {
 	case lexicon.SchemaSubscription:
 		desc = v.Description
 	case lexicon.SchemaPermissionSet:
-		// TODO: extract *some* description?
-	case lexicon.SchemaPermission:
 		desc = v.Description
-	case lexicon.SchemaNull:
+	case lexicon.SchemaPermission:
 		desc = v.Description
 	case lexicon.SchemaBoolean:
 		desc = v.Description