diff --git a/src/interface.jl b/src/interface.jl
index e51ba7a..96cc99e 100644
--- a/src/interface.jl
+++ b/src/interface.jl
@@ -78,7 +78,7 @@ function removeLatestMsg(a::agent)
   end
 end
 
-function generatePrompt(a::agent, 
+function generatePrompt(a::agent; 
                       userToken::String=" [/INST]", assistantToken=" [INST]", 
                       systemToken="[INST]<<SYS>> content <</SYS>>")
   prompt = nothing