diff --git a/lang/strings_english.txt b/lang/strings_english.txt
index 6c54d8d45e..9738a65817 100644
--- a/lang/strings_english.txt
+++ b/lang/strings_english.txt
@@ -739,6 +739,9 @@ $s_last_visit = 'Last Visit';
 $s_last_visit_label = 'Last Visit:';
 $s_edit_user_link = 'Edit User';
 
+# manage_custom_field_edit_page.php
+$s_separate_list_items_by = '(separate list items by "%1$s")';
+
 # manage_config_email_page
 $s_config_all_projects = 'Note: These configurations affect all projects, unless overridden at the project level.';
 $s_config_project = 'Note: These configurations affect only the %1$s project.';
diff --git a/manage_custom_field_edit_page.php b/manage_custom_field_edit_page.php
index c85163ab6b..95f7660c61 100644
--- a/manage_custom_field_edit_page.php
+++ b/manage_custom_field_edit_page.php
@@ -88,7 +88,9 @@
 			</div>
 			<div class="field-container">
 				<label for="custom-field-possible-values"><span><?php echo lang_get( 'custom_field_possible_values' ) ?></span></label>
-				<span class="input"><input type="text" id="custom-field-possible-values" name="possible_values" size="32" value="<?php echo string_attribute( $t_definition['possible_values'] ) ?>" /></span>
+				<span class="input"><input type="text" id="custom-field-possible-values" name="possible_values" size="100" value="<?php echo string_attribute( $t_definition['possible_values'] ) ?>" />
+					<?php echo sprintf( lang_get( 'separate_list_items_by' ), '|' ) ?>
+				</span>
 				<span class="label-style"></span>
 			</div>
 			<div class="field-container">