2 files changed, 3 insertions, 3 deletions
diff --git a/libcommon/common/common.hxx b/libcommon/common/common.hxx
index 2b79a5a..0d56d7c 100644
--- a/libcommon/common/common.hxx
+++ b/libcommon/common/common.hxx
@@ -38,11 +38,11 @@ create_specific_database (int& argc,
 }
 
 // This function returns an accurate result only if the result iterator
-// hasn't been advanced.
+// hasn't been advanced and after the call the result is no longer valid.
 //
 template <typename T>
 std::size_t
-size (odb::result<T>&);
+size (odb::result<T>);
 
 #include <common/common.txx>
 
diff --git a/libcommon/common/common.txx b/libcommon/common/common.txx
index 66ccac9..5c40520 100644
--- a/libcommon/common/common.txx
+++ b/libcommon/common/common.txx
@@ -11,7 +11,7 @@ size_available ();
 
 template <typename T>
 std::size_t
-size (odb::result<T>& r)
+size (odb::result<T> r)
 {
   if (size_available ())
     return r.size ();