diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 4b7bd8a86e..b91d6c75d2 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -2303,6 +2303,7 @@ include_dir 'conf.d'
         <xref linkend="guc-full-page-writes"> is on or during a base backup.
         A compressed page image will be decompressed during WAL replay.
         The default value is <literal>off</>.
+        Only superusers can change this setting.
        </para>
 
        <para>
diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index 595a609989..1bed5250a6 100644
--- a/src/backend/utils/misc/guc.c
+++ b/src/backend/utils/misc/guc.c
@@ -995,7 +995,7 @@ static struct config_bool ConfigureNamesBool[] =
 	},
 
 	{
-		{"wal_compression", PGC_USERSET, WAL_SETTINGS,
+		{"wal_compression", PGC_SUSET, WAL_SETTINGS,
 			gettext_noop("Compresses full-page writes written in WAL file."),
 			NULL
 		},