diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/opac.pref b/koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/opac.pref
index 2866f8d3d2..dec0727f09 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/opac.pref
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/opac.pref
@@ -9,7 +9,7 @@ OPAC:
             - "The OPAC is located at http://"
             - pref: OPACBaseURL
               class: url
-            - . (This must be filled in correctly for RSS, unAPI, and search plugins to work.)
+            - . Do not include a trailing slash in the URL. (This must be filled in correctly for RSS, unAPI, and search plugins to work.)
         -
             - Show
             - pref: LibraryName
diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/staff_client.pref b/koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/staff_client.pref
index d9fc21a3bf..de47c3bec8 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/staff_client.pref
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/staff_client.pref
@@ -9,7 +9,7 @@ Staff Client:
             - "The staff client is located at http://"
             - pref: staffClientBaseURL
               class: url
-            - .
+            - . Do not include a trailing slash in the URL.
         -
             - Include the stylesheet at
             - pref: intranetstylesheet