diff --git a/src/Dates.cpp b/src/Dates.cpp
index e3776dd49..a12f49467 100644
--- a/src/Dates.cpp
+++ b/src/Dates.cpp
@@ -551,6 +551,7 @@ bool namedDates (const std::string& name, Variant& value)
   else
     return false;
 
+  value.source (name);
   return true;
 }