diff --git a/C4/Heading/MARC21.pm b/C4/Heading/MARC21.pm
index 1a4cfc3055..6d334a6223 100644
--- a/C4/Heading/MARC21.pm
+++ b/C4/Heading/MARC21.pm
@@ -136,7 +136,7 @@ my $bib_heading_fields = {
     },
     '648' => { auth_type => 'CHRON_TERM', subfields => 'avxyz',  subject => 1 },
     '650' => { auth_type => 'TOPIC_TERM', subfields => 'abvxyz', subject => 1 },
-    '651' => { auth_type => 'GEOGR_NAME', subfields => 'avxyz',  subject => 1 },
+    '651' => { auth_type => 'GEOGR_NAME', subfields => 'agvxyz', subject => 1 },
     '655' => { auth_type => 'GENRE/FORM', subfields => 'avxyz',  subject => 1 },
     '690' => { auth_type => 'TOPIC_TERM', subfields => 'abvxyz', subject => 1 },
     '691' => { auth_type => 'GEOGR_NAME', subfields => 'avxyz',  subject => 1 },