diff --git a/CHANGES b/CHANGES
index 73ea2d392c..970985ef55 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+4132.	[cleanup]	dig: added +rd as a synonym for +recurse,
+			added +class as an unabbreviated alternative
+			to +cl. [RT #39686]
+
 4130.	[bug]		The compatability shim for *printf() misprinted some
 			large numbers. [RT #39586]
 
diff --git a/bin/dig/dig.c b/bin/dig/dig.c
index 135d0a8be4..6bb5733146 100644
--- a/bin/dig/dig.c
+++ b/bin/dig/dig.c
@@ -836,8 +836,9 @@ plus_option(char *option, isc_boolean_t is_batchfile,
 				goto invalid_option;
 			}
 			break;
-		case 'l': /* cl */
-			FULLCHECK("cl");
+		case 'l': /* class */
+			/* keep +cl for backwards compatibility */
+			FULLCHECK2("cl", "class");
 			noclass = ISC_TF(!state);
 			break;
 		case 'm': /* cmd */
@@ -989,6 +990,10 @@ plus_option(char *option, isc_boolean_t is_batchfile,
 		break;
 	case 'r':
 		switch (cmd[1]) {
+		case 'd': /* rdflag */
+			FULLCHECK("rdflag");
+			lookup->recurse = state;
+			break;
 		case 'e':
 			switch (cmd[2]) {
 			case 'c': /* recurse */
diff --git a/bin/dig/dig.docbook b/bin/dig/dig.docbook
index b05d5d353b..52b0519592 100644
--- a/bin/dig/dig.docbook
+++ b/bin/dig/dig.docbook
@@ -436,6 +436,9 @@
       that keyword.  Other
       keywords assign values to options like the timeout interval.  They
       have the form <option>+keyword=value</option>.
+      Keywords may be abbreviated, provided the abbreviation is
+      unambiguous; for example, <literal>+cd</literal> is equivalent
+      to <literal>+cdflag</literal>.
       The query options are:
 
       <variablelist>
@@ -551,7 +554,7 @@
 	</varlistentry>
 
 	<varlistentry>
-	  <term><option>+[no]cl</option></term>
+	  <term><option>+[no]class</option></term>
 	  <listitem>
 	    <para>
 	      Display [do not display] the CLASS when printing the
@@ -763,6 +766,15 @@
 	  </listitem>
 	</varlistentry>
 
+	<varlistentry>
+	  <term><option>+[no]rdflag</option></term>
+	  <listitem>
+	    <para>
+	      A synonym for <parameter>+[no]recurse</parameter>.
+	    </para>
+	  </listitem>
+	</varlistentry>
+
 	<varlistentry>
 	  <term><option>+[no]recurse</option></term>
 	  <listitem>