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-rw-r--r--ext/io/wait/wait.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/ext/io/wait/wait.c b/ext/io/wait/wait.c
index c7a290fd4f..d8bb55fc47 100644
--- a/ext/io/wait/wait.c
+++ b/ext/io/wait/wait.c
@@ -96,6 +96,8 @@ io_ready_p(VALUE io)
* call-seq:
* io.wait -> IO, true, false or nil
* io.wait(timeout) -> IO, true, false or nil
+ * io.wait_readable -> IO, true, false or nil
+ * io.wait_readable(timeout) -> IO, true, false or nil
*
* Waits until input is available or times out and returns self or nil when
* EOF is reached.