diff --git a/DbService/DbService.fs b/DbService/DbService.fs
index a6f41a6..0880496 100644
--- a/DbService/DbService.fs
+++ b/DbService/DbService.fs
@@ -110,7 +110,7 @@ let addAchievement connStr (did : uint64) (achievement : string) =
         [ ( "did" , Sql.string (string did) )
           ( "symbol", Sql.string achievement ) ]
     |> Sql.query """
-            WITH ach AS (SELECT id FROM achievement WHERE symbol = @symbol),
+            WITH ach AS (SELECT id FROM achievement WHERE symbol = cast(@symbol AS achievement_symbol_enum)),
                  usr AS (SELECT id FROM "user" WHERE discord_id = @did)
             INSERT INTO user_achievements_achievement (user_id, achievement_id) SELECT usr.id, ach.id FROM usr, ach;
        """