diff --git a/ratelimit/rate_limit_manager.nim b/ratelimit/rate_limit_manager.nim
index 80c2362..5aaacc5 100644
--- a/ratelimit/rate_limit_manager.nim
+++ b/ratelimit/rate_limit_manager.nim
@@ -8,16 +8,16 @@ type
     AlmostNone
     None
 
-  SendResult* = enum
-    PassedToSender = 0
-    Enqueued = 1
-    Dropped = 2
-    DroppedBatchTooLarge = 3
+  SendResult* {.pure.} = enum
+    PassedToSender
+    Enqueued
+    Dropped
+    DroppedBatchTooLarge
 
-  Priority* = enum
-    Critical = 0
-    Normal = 1
-    Optional = 2
+  Priority* {.pure.} = enum
+    Critical
+    Normal
+    Optional
 
   Serializable* =
     concept x