diff --git a/src/llama_cpp_agent/messages_formatter.py b/src/llama_cpp_agent/messages_formatter.py
index 3b0b27b..3fadecb 100644
--- a/src/llama_cpp_agent/messages_formatter.py
+++ b/src/llama_cpp_agent/messages_formatter.py
@@ -145,7 +145,7 @@ def _format_response(
 vicuna_prompt_markers = {
     Roles.system: PromptMarkers("", """\n\n"""),
     Roles.user: PromptMarkers("""USER: """, """\n"""),
-    Roles.assistant: PromptMarkers("""ASSISTANT:""", ""),
+    Roles.assistant: PromptMarkers("""ASSISTANT:""", "\n"),
     Roles.tool: PromptMarkers("", ""),
 }