diff --git a/Doc/library/signal.rst b/Doc/library/signal.rst
index a97ce66..ed616b2 100644
--- a/Doc/library/signal.rst
+++ b/Doc/library/signal.rst
@@ -318,6 +318,9 @@
    attempting to call it from other threads will cause a :exc:`ValueError`
    exception to be raised.
 
+   .. versionchanged:: 3.5
+      On Windows, the function now also supports socket handles.
+
 
 .. function:: siginterrupt(signalnum, flag)