diff --git a/man2/fallocate.2 b/man2/fallocate.2
index 6b2a16a57..290e12ba0 100644
--- a/man2/fallocate.2
+++ b/man2/fallocate.2
@@ -349,6 +349,10 @@ is marked append-only
 (see
 .BR chattr (1)).
 .TP
+.B EPERM
+The operation was prevented by a file seal; see
+.BR fcntl (2).
+.TP
 .B ESPIPE
 .I fd
 refers to a pipe or FIFO.
diff --git a/man2/mmap.2 b/man2/mmap.2
index cfddeaa6e..951451bae 100644
--- a/man2/mmap.2
+++ b/man2/mmap.2
@@ -465,6 +465,10 @@ but the mapped area belongs to a file on a filesystem that
 was mounted no-exec.
 .\" (Since 2.4.25 / 2.6.0.)
 .TP
+.B EPERM
+The operation was prevented by a file seal; see
+.BR fcntl (2).
+.TP
 .B ETXTBSY
 .B MAP_DENYWRITE
 was set but the object specified by
diff --git a/man2/open.2 b/man2/open.2
index 52d6b48a4..d6bff3ed4 100644
--- a/man2/open.2
+++ b/man2/open.2
@@ -980,6 +980,10 @@ flag was specified, but the effective user ID of the caller
 did not match the owner of the file and the caller was not privileged
 .RB ( CAP_FOWNER ).
 .TP
+.B EPERM
+The operation was prevented by a file seal; see
+.BR fcntl (2).
+.TP
 .B EROFS
 .I pathname
 refers to a file on a read-only filesystem and write access was
diff --git a/man2/truncate.2 b/man2/truncate.2
index 2ab57da68..4ca142b01 100644
--- a/man2/truncate.2
+++ b/man2/truncate.2
@@ -169,6 +169,10 @@ A component of the path prefix is not a directory.
 The underlying filesystem does not support extending
 a file beyond its current size.
 .TP
+.B EPERM
+The operation was prevented by a file seal; see
+.BR fcntl (2).
+.TP
 .B EROFS
 The named file resides on a read-only filesystem.
 .TP
diff --git a/man2/write.2 b/man2/write.2
index 6b8a5b8c8..4882217b7 100644
--- a/man2/write.2
+++ b/man2/write.2
@@ -171,6 +171,10 @@ The device containing the file referred to by
 .I fd
 has no room for the data.
 .TP
+.B EPERM
+The operation was prevented by a file seal; see
+.BR fcntl (2).
+.TP
 .B EPIPE
 .I fd
 is connected to a pipe or socket whose reading end is closed.