diff --git a/aider/args.py b/aider/args.py
index 23983041a..151724565 100644
--- a/aider/args.py
+++ b/aider/args.py
@@ -207,7 +207,7 @@ def get_parser(default_config_files, git_root):
     )
     group.add_argument(
         "--timeout",
-        type=float,
+        type=int,
         default=None,
         help="Timeout in seconds for API calls (default: None)",
     )