diff --git a/src/Plugins/BotSharp.Plugin.KnowledgeBase/Functions/MemorizeKnowledgeFn.cs b/src/Plugins/BotSharp.Plugin.KnowledgeBase/Functions/MemorizeKnowledgeFn.cs
index 1944ad99..0ef0f950 100644
--- a/src/Plugins/BotSharp.Plugin.KnowledgeBase/Functions/MemorizeKnowledgeFn.cs
+++ b/src/Plugins/BotSharp.Plugin.KnowledgeBase/Functions/MemorizeKnowledgeFn.cs
@@ -36,7 +36,7 @@ public class MemorizeKnowledgeFn : IFunctionCallback
             args.Question, 
             new Dictionary<string, string> 
             { 
-                { "answer", args.Answer } 
+                { KnowledgePayloadName.Answer, args.Answer } 
             });
 
         message.Content = result ? "Saved to my brain" : "I forgot it";