diff --git a/xo-expression2/src/expression2/expression2_register_facets.cpp b/xo-expression2/src/expression2/expression2_register_facets.cpp
index f14ceae6..a3a4b520 100644
--- a/xo-expression2/src/expression2/expression2_register_facets.cpp
+++ b/xo-expression2/src/expression2/expression2_register_facets.cpp
@@ -5,6 +5,7 @@
 
 #include "expression2_register_facets.hpp"
 
+#include <xo/expression2/UniqueString.hpp>
 #include <xo/expression2/detail/IGCObject_DUniqueString.hpp>
 #include <xo/expression2/detail/IPrintable_DUniqueString.hpp>
 
@@ -47,8 +48,6 @@ namespace xo {
         {
             scope log(XO_DEBUG(true));
 
-
-
             FacetRegistry::register_impl<AGCObject, DUniqueString>();
             FacetRegistry::register_impl<APrintable, DUniqueString>();
 
@@ -105,6 +104,8 @@ namespace xo {
             // until we register facets
             TypeRegistry::register_type<DGlobalSymtab>();
 
+            TypeRegistry::register_type<DGlobalSymtab::repr_type>();
+
             log && log(xtag("DUniqueString.tseq", typeseq::id<DUniqueString>()));
             log && log(xtag("DDefineExpr.tseq", typeseq::id<DDefineExpr>()));
             log && log(xtag("DVariable.tseq", typeseq::id<DVariable>()));
diff --git a/xo-reader2/include/xo/reader2/SchematikaReader.hpp b/xo-reader2/include/xo/reader2/SchematikaReader.hpp
index 73b8166b..5a4243a1 100644
--- a/xo-reader2/include/xo/reader2/SchematikaReader.hpp
+++ b/xo-reader2/include/xo/reader2/SchematikaReader.hpp
@@ -49,7 +49,7 @@ namespace xo {
              **/
             SchematikaReader(const ReaderConfig & config,
                              obj<AAllocator> expr_alloc,
-                             obj<AAllocator> fixed_alloc);
+                             obj<AAllocator> aux_alloc);
 
             /** non-trivial dtor because of @p parser **/
             ~SchematikaReader() = default;
diff --git a/xo-reader2/src/reader2/SchematikaParser.cpp b/xo-reader2/src/reader2/SchematikaParser.cpp
index 48e109da..37ebdd05 100644
--- a/xo-reader2/src/reader2/SchematikaParser.cpp
+++ b/xo-reader2/src/reader2/SchematikaParser.cpp
@@ -22,12 +22,12 @@ namespace xo {
 
         SchematikaParser::SchematikaParser(const ParserConfig & cfg,
                                            obj<AAllocator> expr_alloc,
-                                           obj<AAllocator> fixed_alloc)
+                                           obj<AAllocator> aux_alloc)
         : psm_{cfg.parser_arena_config_,
                cfg.symtab_config_,
                cfg.max_stringtable_capacity_,
                expr_alloc,
-               fixed_alloc},
+               aux_alloc},
           debug_flag_{cfg.debug_flag_}
         {
         }
diff --git a/xo-reader2/src/reader2/SchematikaReader.cpp b/xo-reader2/src/reader2/SchematikaReader.cpp
index e02eefa2..98d44112 100644
--- a/xo-reader2/src/reader2/SchematikaReader.cpp
+++ b/xo-reader2/src/reader2/SchematikaReader.cpp
@@ -11,7 +11,7 @@ namespace xo {
     namespace scm {
         SchematikaReader::SchematikaReader(const ReaderConfig & config,
                                            obj<AAllocator> expr_alloc,
-                                           obj<AAllocator> fixed_alloc)
+                                           obj<AAllocator> aux_alloc)
                 : tokenizer_{config.tk_buffer_config_,
                              config.tk_debug_flag_},
                   parser_{ParserConfig(config.parser_arena_config_,
@@ -19,7 +19,7 @@ namespace xo {
                                        config.max_stringtable_cap_,
                                        config.parser_debug_flag_),
                           expr_alloc,
-                          fixed_alloc},
+                          aux_alloc},
                   debug_flag_{config.reader_debug_flag_}
         {
         }