diff --git a/man2/kcmp.2 b/man2/kcmp.2
index 8de4a25b3..22ff0a2eb 100644
--- a/man2/kcmp.2
+++ b/man2/kcmp.2
@@ -157,12 +157,13 @@ See the discussion of the
 flag in
 .BR clone (2).
 .TP
-.BR KCMP_EPOLL_TFD
+.BR KCMP_EPOLL_TFD " (since Linux 4.13)"
+.\" commit 0791e3644e5ef21646fe565b9061788d05ec71d4
 Check whether the file descriptor
 .I idx1
 of the process
 .I pid1
-present in
+is present in the
 .BR epoll (7)
 instance described by
 .I idx2
@@ -170,29 +171,28 @@ of the process
 .IR pid2 .
 The argument
 .I idx2
-is an address of a structure where the target file is described.
+is a pointer to a structure where the target file is described.
+This structure has the form:
 .in +4n
 .nf
 .sp
 struct kcmp_epoll_slot {
-	__u32 efd;
-	__u32 tfd;
-	__u64 toff;
+    __u32 efd;
+    __u32 tfd;
+    __u64 toff;
 };
 .fi
 .in
-.sp
-where
+Within this structure,
 .I efd
-is epoll file descriptor from
-.BR epoll_create (2)
-call,
+is an epoll file descriptor returned from
+.BR epoll_create (2),
 .I tfd
-is a target file number,
+is a target file descriptor number, and
 .I toff
 is a target file offset counted from zero.
 Several different targets may be registered with
-the same file descriptor number and setting specific
+the same file descriptor number and setting a specific
 offset helps to investigate each of them.
 .PP
 Note the
@@ -292,7 +292,7 @@ is outside of the user's address space.
 .TP
 .B ENOENT
 The target file is not present in
-.BR epoll ()
+.BR epoll (7)
 instance.
 .SH VERSIONS
 The