diff --git a/xo-reader2/include/xo/reader2/reader2_register_facets.hpp b/xo-reader2/include/xo/reader2/reader2_register_facets.hpp
new file mode 100644
index 00000000..6e606e40
--- /dev/null
+++ b/xo-reader2/include/xo/reader2/reader2_register_facets.hpp
@@ -0,0 +1,15 @@
+/** @file reader2_register_facets.hpp
+ *
+ *  @author Roland Conybeare, Jan 2026
+ **/
+
+#pragma once
+
+namespace xo {
+    namespace scm {
+        /** Register reader2 (facet,impl) combinations with FacetRegistry **/
+        bool reader2_register_facets();
+    }
+}
+
+/* end reader2_register_facets.hpp */
diff --git a/xo-reader2/src/reader2/CMakeLists.txt b/xo-reader2/src/reader2/CMakeLists.txt
index e8bfb1d7..ee214f56 100644
--- a/xo-reader2/src/reader2/CMakeLists.txt
+++ b/xo-reader2/src/reader2/CMakeLists.txt
@@ -13,7 +13,7 @@ set(SELF_SRCS
     DExprSeqState.cpp
     ISyntaxStateMachine_DExprSeqState.cpp
 
-    #reader2_register_facets.cpp
+    reader2_register_facets.cpp
     #reader2_register_types.cpp
     )
 
diff --git a/xo-reader2/src/reader2/ParserStack.cpp b/xo-reader2/src/reader2/ParserStack.cpp
index 7e8f6b1b..3648cb4d 100644
--- a/xo-reader2/src/reader2/ParserStack.cpp
+++ b/xo-reader2/src/reader2/ParserStack.cpp
@@ -10,6 +10,10 @@ namespace xo {
     using xo::facet::typeseq;
 
     namespace scm {
+        ParserStack::ParserStack(obj<ASyntaxStateMachine> ssm,
+                                 ParserStack * parent)
+            : ssm_{ssm}, parent_{parent}
+        {}
 
         ParserStack *
         ParserStack::push(obj<AAllocator> mm,
diff --git a/xo-reader2/src/reader2/reader2_register_facets.cpp b/xo-reader2/src/reader2/reader2_register_facets.cpp
new file mode 100644
index 00000000..e5b1d157
--- /dev/null
+++ b/xo-reader2/src/reader2/reader2_register_facets.cpp
@@ -0,0 +1,33 @@
+/** @file reader2_register_facets.cpp
+ *
+ *  @author Roland Conybeare, Jan 2026
+ **/
+
+#include "reader2_register_facets.hpp"
+
+#include <xo/reader2/ssm/ISyntaxStateMachine_DExprSeqState.hpp>
+
+#include <xo/reader2/ssm/ASyntaxStateMachine.hpp>
+#include <xo/facet/FacetRegistry.hpp>
+#include <xo/indentlog/scope.hpp>
+
+namespace xo {
+    using xo::facet::FacetRegistry;
+    using xo::facet::typeseq;
+
+    namespace scm {
+        bool
+        reader2_register_facets()
+        {
+            scope log(XO_DEBUG(true));
+
+            FacetRegistry::register_impl<ASyntaxStateMachine, DExprSeqState>();
+
+            log && log(xtag("DExprSeqState.tseq", typeseq::id<DExprSeqState>()));
+
+            return true;
+        }
+    } /*namespace scm*/
+} /*namespace xo*/
+
+/* end reader2_register_facets.cpp */