1 files changed, 13 insertions, 1 deletions
diff --git a/odb/details/lock.hxx b/odb/details/lock.hxx
index 26ab4a8..28f3ede 100644
--- a/odb/details/lock.hxx
+++ b/odb/details/lock.hxx
@@ -10,12 +10,23 @@
 #include <odb/details/export.hxx>
 #include <odb/details/mutex.hxx>
 
+#ifdef ODB_THREADS_CXX11
+#  include <mutex>
 namespace odb
 {
   namespace details
   {
-    struct LIBODB_EXPORT lock
+    using lock = std::unique_lock<mutex>;
+  }
+}
+#else
+namespace odb
+{
+  namespace details
+  {
+    class LIBODB_EXPORT lock
     {
+    public:
       lock (mutex& m)
           : mutex_ (&m)
       {
@@ -43,6 +54,7 @@ namespace odb
     };
   }
 }
+#endif
 
 #include <odb/post.hxx>