diff --git a/docs/source/intro/async-callable.md b/docs/source/intro/async-callable.md
index c98e8d7e..1b29577d 100644
--- a/docs/source/intro/async-callable.md
+++ b/docs/source/intro/async-callable.md
@@ -83,4 +83,4 @@ aprint = to_async(print)
 另外，有的接口支持 {class}`.SyncOrAsyncCallable` 类型的参数，这表明它是**同时支持同步可调用、异步可调用**的。{class}`.SyncOrAsyncCallable` 有以下特性：
 
 {class}`.SyncOrAsyncCallable`\[{data}`.P`, {data}`.T`\] {math}`\iff`
-{external:class}`~collections.abc.Callable`\[{data}`.P`, {external:class}`~collections.abc.Awaitable`\[{data}`.T` | {external:class}`~typing.Awaitable`\[{data}`.T`\]\]\]
+{external:class}`~collections.abc.Callable`\[{data}`.P`, {data}`.T` | {external:class}`~typing.Awaitable`\[{data}`.T`\]\]