diff --git a/components/com_finder/models/suggestions.php b/components/com_finder/models/suggestions.php
index f4fb2c2757cb1..5e8b8638d1bb8 100644
--- a/components/com_finder/models/suggestions.php
+++ b/components/com_finder/models/suggestions.php
@@ -70,7 +70,7 @@ protected function getListQuery()
 		// Limit term count to a reasonable number of results to reduce main query join size
 		$termIdQuery->select('ti.term_id')
 			->from($db->quoteName('#__finder_terms', 'ti'))
-			->where('ti.term LIKE ' . $db->quote($db->escape($this->getState('input'), true) . '%', false))
+			->where('ti.term LIKE ' . $db->quote($db->escape(StringHelper::strtolower($this->getState('input')), true) . '%', false))
 			->where('ti.common = 0')
 			->where('ti.language IN (' . $db->quote($this->getState('language')) . ', ' . $db->quote('*') . ')')
 			->order('ti.links DESC')
@@ -94,7 +94,7 @@ protected function getListQuery()
 			->order('t.weight DESC');
 
 		// Determine the relevant mapping table suffix by inverting the logic from drivers
-		$mappingTableSuffix = StringHelper::substr(md5(StringHelper::substr($this->getState('input'), 0, 1)), 0, 1);
+		$mappingTableSuffix = StringHelper::substr(md5(StringHelper::substr(StringHelper::strtolower($this->getState('input')), 0, 1)), 0, 1);
 
 		// Join mapping table for term <-> link relation
 		$mappingTable = $db->quoteName('#__finder_links_terms' . $mappingTableSuffix);