diff --git a/man3/aio_fsync.3 b/man3/aio_fsync.3
index 05b98a455..dee215dce 100644
--- a/man3/aio_fsync.3
+++ b/man3/aio_fsync.3
@@ -58,7 +58,7 @@ Note that this is a request only \(em this call does not wait
 for I/O completion.
 .LP
 Apart from
-.I aio_fildes
+.IR aio_fildes ,
 the only field in the structure pointed to by
 .I aiocbp
 that is used by this call is the