diff --git a/man3/getopt.3 b/man3/getopt.3
index ce4c28088..315224c64 100644
--- a/man3/getopt.3
+++ b/man3/getopt.3
@@ -130,7 +130,7 @@ A legitimate option character is any visible one byte
 .BR ascii (7)
 character (for which
 .BR isgraph (3)
-would return nonzero) that is not \(aq\-\(aq or \(aq:\(aq.
+would return nonzero) that is not \(aq\-\(aq, \(aq:\(aq  or \(aq;\(aq.
 If such a
 character is followed by a colon, the option requires an argument, so
 .BR getopt ()
@@ -166,6 +166,14 @@ If the first character of
 .B POSIXLY_CORRECT
 is set, then option processing stops as soon as a nonoption argument is
 encountered.
+If \(aq+\(aq is not the first character of
+.IR optstring ,
+it is treated as a normal option.
+If
+.B POSIXLY_CORRECT
+behaviour is required in this case
+.I optstring
+will contain two \(aq+\(aq symbols.
 If the first character of \fIoptstring\fP is \(aq\-\(aq, then
 each nonoption \fIargv\fP-element is handled as if it were the argument of
 an option with character code 1.  (This is used by programs that were