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 d1225b4b59..608a50e40d 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 9754a47878..07db67099b 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