diff --git a/lib/libsys/timerfd.2 b/lib/libsys/timerfd.2
index e5dab05821b..7a112ad0dfc 100644
--- a/lib/libsys/timerfd.2
+++ b/lib/libsys/timerfd.2
@@ -300,7 +300,7 @@ object fails if:
 .It Bq Er EAGAIN
 The timer's expiration counter is zero and the
 .Nm
-object is is set for non-blocking I/O.
+object is set for non-blocking I/O.
 .It Bq Er ECANCELED
 The timer was created with the clock ID
 .Dv CLOCK_REALTIME ,