diff --git a/man5/proc.5 b/man5/proc.5
index 5e52b038c..ba890d555 100644
--- a/man5/proc.5
+++ b/man5/proc.5
@@ -1399,9 +1399,12 @@ Under Linux 2.0, there is no field giving pathname.
 This file can be used to access the pages of a process's memory through
 .BR open (2),
 .BR read (2),
+.BR write(2),
 and
 .BR lseek (2).
 .IP
+Permission to use the write(2) syscall is allowed only if the caller of write(2) is the parent process of the [pid] to be written.
+.IP
 Permission to access this file is governed by a ptrace access mode
 .B PTRACE_MODE_ATTACH_FSCREDS
 check; see