diff --git a/include/xo/gc/gcobject/AGCObject.hpp b/include/xo/gc/AGCObject.hpp
similarity index 100%
rename from include/xo/gc/gcobject/AGCObject.hpp
rename to include/xo/gc/AGCObject.hpp
diff --git a/include/xo/gc/GCObject.hpp b/include/xo/gc/GCObject.hpp
index edc89c3..524002a 100644
--- a/include/xo/gc/GCObject.hpp
+++ b/include/xo/gc/GCObject.hpp
@@ -5,9 +5,9 @@
 
 #pragma once
 
-#include "gcobject/AGCObject.hpp"
-#include "gcobject/IGCObject_Any.hpp"
-#include "gcobject/IGCObject_Xfer.hpp"
-#include "gcobject/RGCObject.hpp"
+#include "AGCObject.hpp"
+#include "detail/IGCObject_Any.hpp"
+#include "detail/IGCObject_Xfer.hpp"
+#include "detail/RGCObject.hpp"
 
 /* end GCObject.hpp */
diff --git a/include/xo/gc/detail/ACollector.hpp b/include/xo/gc/detail/ACollector.hpp
index 9c32125..d0d34bd 100644
--- a/include/xo/gc/detail/ACollector.hpp
+++ b/include/xo/gc/detail/ACollector.hpp
@@ -5,7 +5,7 @@
 
 #pragma once
 
-#include "gcobject/IGCObject_Any.hpp"
+#include "IGCObject_Any.hpp"
 
 #include <xo/facet/facet_implementation.hpp>
 #include <xo/facet/typeseq.hpp>
@@ -34,9 +34,12 @@ namespace xo {
 
             virtual int32_t _typeseq() const noexcept = 0;
 
-            virtual size_type allocated(Copaque d, generation g, role r) const noexcept = 0;
-            virtual size_type reserved(Copaque d, generation g, role r) const noexcept = 0;
-            virtual size_type committed(Copaque d, generation g, role r) const noexcept = 0;
+            virtual size_type allocated(Copaque d,
+                                        generation g, role r) const noexcept = 0;
+            virtual size_type  reserved(Copaque d,
+                                        generation g, role r) const noexcept = 0;
+            virtual size_type committed(Copaque d,
+                                        generation g, role r) const noexcept = 0;
 
             /** install interface @p iface for representation with typeseq @p tseq
              *  in collector @p d.
diff --git a/include/xo/gc/gcobject/IGCObject_Any.hpp b/include/xo/gc/detail/IGCObject_Any.hpp
similarity index 100%
rename from include/xo/gc/gcobject/IGCObject_Any.hpp
rename to include/xo/gc/detail/IGCObject_Any.hpp
diff --git a/include/xo/gc/gcobject/IGCObject_Xfer.hpp b/include/xo/gc/detail/IGCObject_Xfer.hpp
similarity index 100%
rename from include/xo/gc/gcobject/IGCObject_Xfer.hpp
rename to include/xo/gc/detail/IGCObject_Xfer.hpp
diff --git a/include/xo/gc/gcobject/RGCObject.hpp b/include/xo/gc/detail/RGCObject.hpp
similarity index 100%
rename from include/xo/gc/gcobject/RGCObject.hpp
rename to include/xo/gc/detail/RGCObject.hpp
diff --git a/src/gc/IGCObject_Any.cpp b/src/gc/IGCObject_Any.cpp
index 22e1cf4..0de2122 100644
--- a/src/gc/IGCObject_Any.cpp
+++ b/src/gc/IGCObject_Any.cpp
@@ -3,7 +3,7 @@
  *  @author Roland Conybeare, Dec 2025
  **/
 
-#include "gcobject/IGCObject_Any.hpp"
+#include "detail/IGCObject_Any.hpp"
 #include <iostream>
 
 namespace xo {