diff --git a/src/interpreter2/VirtualSchematikaMachine.cpp b/src/interpreter2/VirtualSchematikaMachine.cpp
index b2d1a675..d0889fa3 100644
--- a/src/interpreter2/VirtualSchematikaMachine.cpp
+++ b/src/interpreter2/VirtualSchematikaMachine.cpp
@@ -19,7 +19,6 @@
 #include <xo/expression2/LambdaExpr.hpp>
 #include <xo/expression2/Constant.hpp>
 #include <xo/expression2/SequenceExpr.hpp>
-#include <xo/expression2/UniqueString.hpp>
 #include <xo/object2/Dictionary.hpp>
 #include <xo/object2/Integer.hpp>
 #include <xo/object2/Boolean.hpp>
@@ -29,6 +28,7 @@
 #include <xo/procedure2/Primitive_gco_3_dict_string_gco.hpp>
 #include <xo/gc/X1Collector.hpp>
 #include <xo/reflect/Reflect.hpp>
+#include <xo/stringtable2/UniqueString.hpp>
 #include <xo/alloc2/Arena.hpp>
 #include <xo/printable2/Printable.hpp>
 #include <xo/facet/FacetRegistry.hpp>
diff --git a/utest/VirtualSchematikaMachine.test.cpp b/utest/VirtualSchematikaMachine.test.cpp
index b312395c..21b5faa3 100644
--- a/utest/VirtualSchematikaMachine.test.cpp
+++ b/utest/VirtualSchematikaMachine.test.cpp
@@ -6,13 +6,13 @@
 #include <xo/interpreter2/init_interpreter2.hpp>
 #include <xo/interpreter2/VirtualSchematikaMachine.hpp>
 #include <xo/interpreter2/Closure.hpp>
-#include <xo/expression2/UniqueString.hpp>
 #include <xo/object2/Array.hpp>
 #include <xo/object2/List.hpp>
 #include <xo/object2/Float.hpp>
 #include <xo/object2/Integer.hpp>
 #include <xo/object2/Boolean.hpp>
 #include <xo/object2/RuntimeError.hpp>
+#include <xo/stringtable2/UniqueString.hpp>
 #include <xo/alloc2/Arena.hpp>
 #include <xo/facet/TypeRegistry.hpp>
 #include <xo/indentlog/print/hex.hpp>