diff --git a/aider/coder.py b/aider/coder.py
index c1275ec17..694084820 100755
--- a/aider/coder.py
+++ b/aider/coder.py
@@ -45,7 +45,7 @@ class Coder:
         self.main_model = main_model
         if main_model == "gpt-3.5-turbo":
             self.io.tool_error(
-                f"Aider doesn't work well with {main_model}, use gpt-4 for best results."
+                f"aider doesn't work well with {main_model}, use gpt-4 for best results."
             )
 
         self.set_repo(fnames)
diff --git a/aider/io.py b/aider/io.py
index 24d5d9ea9..3731a1e4f 100644
--- a/aider/io.py
+++ b/aider/io.py
@@ -67,7 +67,7 @@ class InputOutput:
             self.console = Console(force_terminal=True, no_color=True)
 
         current_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
-        self.append_chat_history(f"\n# Aider chat started at {current_time}\n\n")
+        self.append_chat_history(f"\n# aider chat started at {current_time}\n\n")
 
     def canned_input(self, show_prompt):
         console = Console()