diff --git a/cogs/gpt_3_commands_and_converser.py b/cogs/gpt_3_commands_and_converser.py
index fb1bdc7..7eb4b4b 100644
--- a/cogs/gpt_3_commands_and_converser.py
+++ b/cogs/gpt_3_commands_and_converser.py
@@ -1113,6 +1113,10 @@ class GPT3ComCon(discord.Cog, name="GPT3ComCon"):
         user = ctx.user
         prompt = prompt.strip()
 
+        # If the prompt isn't empty and the last character isn't a punctuation character, add a period.
+        if prompt and prompt[-1] not in [".", "!", "?"]:
+            prompt += "."
+
         user_api_key = None
         if USER_INPUT_API_KEYS:
             user_api_key = await GPT3ComCon.get_user_api_key(user.id, ctx)