diff --git a/C4/Koha.pm b/C4/Koha.pm
index fbb90681a2..e78910efdf 100644
--- a/C4/Koha.pm
+++ b/C4/Koha.pm
@@ -708,7 +708,7 @@ sub getFacets {
                 idx   => 'au',
                 label => 'Authors',
                 tags  => [ qw/ 700ab 701ab 702ab / ],
-                sep   => ', ',
+                sep   => C4::Context->preference("UNIMARCAuthorsFacetsSeparator"),
             },
             {
                 idx   => 'se',
diff --git a/installer/data/mysql/sysprefs.sql b/installer/data/mysql/sysprefs.sql
index 4d8c612f98..af1d85fcf9 100644
--- a/installer/data/mysql/sysprefs.sql
+++ b/installer/data/mysql/sysprefs.sql
@@ -389,4 +389,4 @@ INSERT INTO systempreferences (variable, value, options, explanation, type) VALU
 INSERT INTO systempreferences (variable,value,explanation,options,type) VALUES('HoldsToPullStartDate','2','Set the default start date for the Holds to pull list to this many days ago',NULL,'Integer');
 INSERT INTO systempreferences (variable,value,options,explanation,type) VALUES ('OPACNumbersPreferPhrase','0', NULL, 'Control the use of phr operator in callnumber and standard number OPAC searches', 'YesNo');
 INSERT INTO systempreferences (variable,value,options,explanation,type) VALUES ('IntranetNumbersPreferPhrase','0', NULL, 'Control the use of phr operator in callnumber and standard number staff client searches', 'YesNo');
-
+INSERT INTO systempreferences (variable,value,explanation,options,type) VALUES ('UNIMARCAuthorsFacetsSeparator',', ', 'UNIMARC authors facets separator', NULL, 'short');
diff --git a/installer/data/mysql/updatedatabase.pl b/installer/data/mysql/updatedatabase.pl
index c47cd3bebd..fe98f1db1b 100755
--- a/installer/data/mysql/updatedatabase.pl
+++ b/installer/data/mysql/updatedatabase.pl
@@ -6174,6 +6174,13 @@ if ( C4::Context->preference("Version") < TransformToNum($DBversion) ) {
     SetVersion($DBversion);
 }
 
+$DBversion = "3.10.04.001";
+if ( C4::Context->preference("Version") < TransformToNum($DBversion) ) {
+   $dbh->do("INSERT INTO systempreferences (variable,value,explanation,options,type) VALUES ('UNIMARCAuthorsFacetsSeparator',', ', 'UNIMARC authors facets separator', NULL, 'short')");
+   print "Upgrade to $DBversion done (Bug 9341: Problem with UNIMARC authors facets)\n";
+   SetVersion ($DBversion);
+}
+
 =head1 FUNCTIONS
 
 =head2 TableExists($table)
diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/searching.pref b/koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/searching.pref
index 451cbc95c7..3a36b03acf 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/searching.pref
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/searching.pref
@@ -176,3 +176,7 @@ Searching:
             - pref: FacetLabelTruncationLength
               class: integer
             - characters, in OPAC/staff interface.
+        -
+            - Use the following text as separator for UNIMARC authors facets
+            - pref: UNIMARCAuthorsFacetsSeparator
+              class: short