diff --git a/Lib/typing.py b/Lib/typing.py
index 7de3e346eaa..28c887ed35e 100644
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -1831,6 +1831,7 @@ class IO(Generic[AnyStr]):
     def close(self) -> None:
         pass
 
+    @property
     @abstractmethod
     def closed(self) -> bool:
         pass
diff --git a/Misc/NEWS.d/next/Library/2020-01-30-01-13-19.bpo-39493.CbFRi7.rst b/Misc/NEWS.d/next/Library/2020-01-30-01-13-19.bpo-39493.CbFRi7.rst
new file mode 100644
index 00000000000..b676629a441
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2020-01-30-01-13-19.bpo-39493.CbFRi7.rst
@@ -0,0 +1 @@
+Mark ``typing.IO.closed`` as a property
\ No newline at end of file