diff --git a/src/db/mapping.cr b/src/db/mapping.cr
index b7b0093..c84b4b7 100644
--- a/src/db/mapping.cr
+++ b/src/db/mapping.cr
@@ -138,4 +138,7 @@ module DB
     end
   end
 
+  macro mapping(**properties)
+    ::DB.mapping({{properties}})
+  end
 end