diff --git a/Classes/ResultsetModifier/LastSearches.php b/Classes/ResultsetModifier/LastSearches.php
index 67dfbd52..9d769946 100644
--- a/Classes/ResultsetModifier/LastSearches.php
+++ b/Classes/ResultsetModifier/LastSearches.php
@@ -46,6 +46,11 @@ class Tx_Solr_ResultsetModifier_LastSearches implements Tx_Solr_ResultSetModifie
 	public function modifyResultSet(Tx_Solr_PiResults_ResultsCommand $resultCommand, array $resultSet) {
 		$this->configuration = $resultCommand->getParentPlugin()->getConfiguration();
 		$keywords = $resultCommand->getParentPlugin()->getSearch()->getQuery()->getKeywordsCleaned();
+		
+		$keywords = trim($keywords);
+		if(empty($keywords)) {
+			return $resultSet;
+		}
 
 		switch ($this->configuration['search.']['lastSearches.']['mode']) {
 			case 'user':
@@ -147,4 +152,4 @@ protected function getNextSequenceId() {
 	include_once($GLOBALS['TYPO3_CONF_VARS'][TYPO3_MODE]['XCLASS']['ext/solr/Classes/query/modifier/class.Tx_Solr_Query_modifier_lastsearches.php']);
 }
 
-?>
\ No newline at end of file
+?>