diff --git a/cibuildwheel/__main__.py b/cibuildwheel/__main__.py
index c5d5d772..be385168 100644
--- a/cibuildwheel/__main__.py
+++ b/cibuildwheel/__main__.py
@@ -153,7 +153,7 @@ def main_inner(global_options: GlobalOptions) -> None:
         metavar="IDENTIFIER",
         help="""
             Force a single wheel build when given an identifier. Overrides
-            CIBW_BUILD/CIBW_SKIP. --platform and --arch cannot be specified
+            CIBW_BUILD/CIBW_SKIP. --platform and --archs cannot be specified
             if this is given.
         """,
     )
@@ -323,7 +323,7 @@ def _compute_platform(args: CommandLineArguments) -> PlatformName:
         msg = "--platform cannot be specified with --only, it is computed from --only"
         raise errors.ConfigurationError(msg)
     if args.only and args.archs is not None:
-        msg = "--arch cannot be specified with --only, it is computed from --only"
+        msg = "--archs cannot be specified with --only, it is computed from --only"
         raise errors.ConfigurationError(msg)
 
     if platform_option_value not in PLATFORMS | {"auto"}:
diff --git a/docs/options.md b/docs/options.md
index c50400bd..c2423941 100644
--- a/docs/options.md
+++ b/docs/options.md
@@ -43,7 +43,7 @@ This option can also be set using the [command-line option](#command-line) `--pl
     This is even more convenient if you store your cibuildwheel config in [`pyproject.toml`](configuration.md#configuration-file).
 
     You can also run a single identifier with `--only <identifier>`. This will
-    not require `--platform` or `--arch`, and will override any build/skip
+    not require `--platform` or `--archs`, and will override any build/skip
     configuration.
 
 ### `build`, `skip` {: #build-skip toml env-var }