diff --git a/lib/imap.c b/lib/imap.c
index a4c137368..469dad32d 100644
--- a/lib/imap.c
+++ b/lib/imap.c
@@ -19,10 +19,10 @@
  * KIND, either express or implied.
  *
  * RFC2195 CRAM-MD5 authentication
- * RFC2222 Simple Authentication and Security Layer (SASL)
  * RFC2595 Using TLS with IMAP, POP3 and ACAP
  * RFC2831 DIGEST-MD5 authentication
  * RFC3501 IMAPv4 protocol
+ * RFC4422 Simple Authentication and Security Layer (SASL)
  * RFC4616 PLAIN authentication
  * RFC5092 IMAP URL Scheme
  *
diff --git a/lib/pop3.c b/lib/pop3.c
index 91e7bcdd8..cb86911dd 100644
--- a/lib/pop3.c
+++ b/lib/pop3.c
@@ -21,11 +21,11 @@
  * RFC1734 POP3 Authentication
  * RFC1939 POP3 protocol
  * RFC2195 CRAM-MD5 authentication
- * RFC2222 Simple Authentication and Security Layer (SASL)
  * RFC2384 POP URL Scheme
  * RFC2449 POP3 Extension Mechanism
  * RFC2595 Using TLS with IMAP, POP3 and ACAP
  * RFC2831 DIGEST-MD5 authentication
+ * RFC4422 Simple Authentication and Security Layer (SASL)
  * RFC4616 PLAIN authentication
  *
  ***************************************************************************/
diff --git a/lib/smtp.c b/lib/smtp.c
index ec077f351..af3fb0680 100644
--- a/lib/smtp.c
+++ b/lib/smtp.c
@@ -22,8 +22,8 @@
  * RFC3207 SMTP over TLS
  * RFC4954 SMTP Authentication
  * RFC2195 CRAM-MD5 authentication
- * RFC2222 Simple Authentication and Security Layer (SASL)
  * RFC2831 DIGEST-MD5 authentication
+ * RFC4422 Simple Authentication and Security Layer (SASL)
  * RFC4616 PLAIN authentication
  *
  ***************************************************************************/