diff --git a/lhc_web/lib/models/lhchat/erlhcoreclassmodelcannedmsg.php b/lhc_web/lib/models/lhchat/erlhcoreclassmodelcannedmsg.php
index c63597b59..b8825c6fa 100644
--- a/lhc_web/lib/models/lhchat/erlhcoreclassmodelcannedmsg.php
+++ b/lhc_web/lib/models/lhchat/erlhcoreclassmodelcannedmsg.php
@@ -201,8 +201,8 @@ public function afterSave()
             $tags[] = trim($tagKeyword);
         }
         
-        $tags = array_unique($tags);
-        
+        $tags = array_filter(array_unique($tags));
+
         foreach ($tags as $tagKeyword) {
             $tagKeywordTrimmed = trim($tagKeyword);