diff --git a/CHANGES b/CHANGES
index 796faffafb..15c0c4fada 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,6 @@
+4523.	[doc]		Expand config doc for <querysource4> and
+			<querysource6>. [RT #43768]
+
 4522.	[bug]		Handle big gaps in log file version numbers better.
 			[RT #38688]
 
diff --git a/doc/misc/options b/doc/misc/options
index 9e66c7550e..37683a7977 100644
--- a/doc/misc/options
+++ b/doc/misc/options
@@ -260,8 +260,12 @@ options {
         preferred-glue <string>;
         prefetch <integer> [ <integer> ];
         provide-ixfr <boolean>;
-        query-source <querysource4>;
-        query-source-v6 <querysource6>;
+        query-source ( ( [ address ] ( <ipv4_address> | * ) [ port (
+            <integer> | * ) ] ) | ( [ [ address ] ( <ipv4_address> | * ) ]
+            port ( <integer> | * ) ) ) [ dscp <integer> ];
+        query-source-v6 ( ( [ address ] ( <ipv6_address> | * ) [ port (
+            <integer> | * ) ] ) | ( [ [ address ] ( <ipv6_address> | * ) ]
+            port ( <integer> | * ) ) ) [ dscp <integer> ];
         querylog <boolean>;
         queryport-pool-ports <integer>; // obsolete
         queryport-pool-updateinterval <integer>; // obsolete
@@ -370,8 +374,12 @@ server <netprefix> {
         notify-source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ]
             [ dscp <integer> ];
         provide-ixfr <boolean>;
-        query-source <querysource4>;
-        query-source-v6 <querysource6>;
+        query-source ( ( [ address ] ( <ipv4_address> | * ) [ port (
+            <integer> | * ) ] ) | ( [ [ address ] ( <ipv4_address> | * ) ]
+            port ( <integer> | * ) ) ) [ dscp <integer> ];
+        query-source-v6 ( ( [ address ] ( <ipv6_address> | * ) [ port (
+            <integer> | * ) ] ) | ( [ [ address ] ( <ipv6_address> | * ) ]
+            port ( <integer> | * ) ) ) [ dscp <integer> ];
         request-expire <boolean>;
         request-ixfr <boolean>;
         request-nsid <boolean>;
@@ -557,8 +565,12 @@ view <string> [ <class> ] {
         preferred-glue <string>;
         prefetch <integer> [ <integer> ];
         provide-ixfr <boolean>;
-        query-source <querysource4>;
-        query-source-v6 <querysource6>;
+        query-source ( ( [ address ] ( <ipv4_address> | * ) [ port (
+            <integer> | * ) ] ) | ( [ [ address ] ( <ipv4_address> | * ) ]
+            port ( <integer> | * ) ) ) [ dscp <integer> ];
+        query-source-v6 ( ( [ address ] ( <ipv6_address> | * ) [ port (
+            <integer> | * ) ] ) | ( [ [ address ] ( <ipv6_address> | * ) ]
+            port ( <integer> | * ) ) ) [ dscp <integer> ];
         queryport-pool-ports <integer>; // obsolete
         queryport-pool-updateinterval <integer>; // obsolete
         rate-limit {
@@ -610,8 +622,14 @@ view <string> [ <class> ] {
                 notify-source-v6 ( <ipv6_address> | * ) [ port ( <integer>
                     | * ) ] [ dscp <integer> ];
                 provide-ixfr <boolean>;
-                query-source <querysource4>;
-                query-source-v6 <querysource6>;
+                query-source ( ( [ address ] ( <ipv4_address> | * ) [ port
+                    ( <integer> | * ) ] ) | ( [ [ address ] (
+                    <ipv4_address> | * ) ] port ( <integer> | * ) ) ) [
+                    dscp <integer> ];
+                query-source-v6 ( ( [ address ] ( <ipv6_address> | * ) [
+                    port ( <integer> | * ) ] ) | ( [ [ address ] (
+                    <ipv6_address> | * ) ] port ( <integer> | * ) ) ) [
+                    dscp <integer> ];
                 request-expire <boolean>;
                 request-ixfr <boolean>;
                 request-nsid <boolean>;
diff --git a/lib/isccfg/namedconf.c b/lib/isccfg/namedconf.c
index 1b3d8a9900..1488e83203 100644
--- a/lib/isccfg/namedconf.c
+++ b/lib/isccfg/namedconf.c
@@ -2973,18 +2973,41 @@ print_querysource(cfg_printer_t *pctx, const cfg_obj_t *obj) {
 	}
 }
 
+static void
+doc_querysource(cfg_printer_t *pctx, const cfg_type_t *type) {
+	const unsigned int *flagp = type->of;
+
+	cfg_print_cstr(pctx, "( ( [ address ] ( ");
+	if (*flagp & CFG_ADDR_V4OK)
+		cfg_print_cstr(pctx, "<ipv4_address>");
+	else if (*flagp & CFG_ADDR_V6OK)
+		cfg_print_cstr(pctx, "<ipv6_address>");
+	else
+		INSIST(0);
+	cfg_print_cstr(pctx, " | * ) [ port ( <integer> | * ) ] ) | "
+		       "( [ [ address ] ( ");
+	if (*flagp & CFG_ADDR_V4OK)
+		cfg_print_cstr(pctx, "<ipv4_address>");
+	else if (*flagp & CFG_ADDR_V6OK)
+		cfg_print_cstr(pctx, "<ipv6_address>");
+	else
+		INSIST(0);
+	cfg_print_cstr(pctx, " | * ) ] port ( <integer> | * ) ) )"
+		       " [ dscp <integer> ]");
+}
+
 static unsigned int sockaddr4wild_flags = CFG_ADDR_WILDOK | CFG_ADDR_V4OK |
 					  CFG_ADDR_DSCPOK;
 static unsigned int sockaddr6wild_flags = CFG_ADDR_WILDOK | CFG_ADDR_V6OK |
 					  CFG_ADDR_DSCPOK;
 
 static cfg_type_t cfg_type_querysource4 = {
-	"querysource4", parse_querysource, NULL, cfg_doc_terminal,
+	"querysource4", parse_querysource, NULL, doc_querysource,
 	NULL, &sockaddr4wild_flags
 };
 
 static cfg_type_t cfg_type_querysource6 = {
-	"querysource6", parse_querysource, NULL, cfg_doc_terminal,
+	"querysource6", parse_querysource, NULL, doc_querysource,
 	NULL, &sockaddr6wild_flags
 };