diff --git a/thin-provisioning/range.h b/persistent-data/range.h
similarity index 90%
rename from thin-provisioning/range.h
rename to persistent-data/range.h
index 9c41d9b..e1bbc09 100644
--- a/thin-provisioning/range.h
+++ b/persistent-data/range.h
@@ -1,12 +1,12 @@
-#ifndef THIN_RANGE_H
-#define THIN_RANGE_H
+#ifndef PERSISTENT_DATA_RANGE_H
+#define PERSISTENT_DATA_RANGE_H
 
 #include <boost/optional.hpp>
 #include <ostream>
 
 //----------------------------------------------------------------
 
-namespace thin_provisioning {
+namespace base {
 	template <typename T>
 	class range {
 	public:
diff --git a/thin-provisioning/metadata_checker.h b/thin-provisioning/metadata_checker.h
index 4db98b8..877f1b5 100644
--- a/thin-provisioning/metadata_checker.h
+++ b/thin-provisioning/metadata_checker.h
@@ -21,10 +21,9 @@
 
 #include "persistent-data/block.h"
 #include "persistent-data/error_set.h"
+#include "persistent-data/range.h"
 #include "persistent-data/space_map.h"
 
-#include "thin-provisioning/range.h"
-
 #include <deque>
 
 //----------------------------------------------------------------
@@ -56,7 +55,7 @@ namespace thin_provisioning {
 		bool operator ==(super_block_corruption const &rhs) const;
 	};
 
-	typedef range<uint64_t> range64;
+	typedef base::range<uint64_t> range64;
 
 	struct missing_device_details : public metadata_damage {
 		missing_device_details(range64 missing);