diff --git a/aider/args.py b/aider/args.py
index d7f3475e8..307eb7f6e 100644
--- a/aider/args.py
+++ b/aider/args.py
@@ -352,6 +352,11 @@ def get_parser(default_config_files, git_root):
         default=False,
         help="Prefix commit messages with 'aider: ' (default: False)",
     )
+    group.add_argument(
+        "--commit-prompt",
+        metavar="PROMPT",
+        help="Specify a custom prompt for generating commit messages",
+    )
     group.add_argument(
         "--dry-run",
         action=argparse.BooleanOptionalAction,
diff --git a/aider/main.py b/aider/main.py
index 75ea3e49b..75b9eae54 100644
--- a/aider/main.py
+++ b/aider/main.py
@@ -490,6 +490,7 @@ def main(argv=None, input=None, output=None, force_git_root=None, return_coder=F
             attribute_committer=args.attribute_committer,
             attribute_commit_message=args.attribute_commit_message,
             verify_ssl=args.verify_ssl,
+            commit_prompt=args.commit_prompt,
         )
 
     except ValueError as err: