diff --git a/src/messenger/webim/install/dbinfo.php b/src/messenger/webim/install/dbinfo.php
index 0a79b3de..39e53dce 100644
--- a/src/messenger/webim/install/dbinfo.php
+++ b/src/messenger/webim/install/dbinfo.php
@@ -150,6 +150,10 @@ $dbtables_indexes = array(
 	"${mysqlprefix}chatgroup" => array(
 		"parent" => "parent"
 	),
+	"${mysqlprefix}chatgroupoperator" => array(
+		"groupid" => "groupid",
+		"operatorid" => "operatorid"
+	),
 	"${mysqlprefix}chatmessage" => array(
 		"idx_agentid" => "agentid"
 	),
diff --git a/src/messenger/webim/install/dbperform.php b/src/messenger/webim/install/dbperform.php
index abfd81a6..d306a932 100644
--- a/src/messenger/webim/install/dbperform.php
+++ b/src/messenger/webim/install/dbperform.php
@@ -194,6 +194,14 @@ if ($act == "silentcreateall") {
 			runsql("ALTER TABLE ${mysqlprefix}chatgroup ADD INDEX (parent)", $link);
 		}
 
+		if (in_array("${mysqlprefix}chatgroupoperator.groupid", $absent_indexes)) {
+			runsql("ALTER TABLE ${mysqlprefix}chatgroupoperator ADD INDEX (groupid)", $link);
+		}
+
+		if (in_array("${mysqlprefix}chatgroupoperator.operatorid", $absent_indexes)) {
+			runsql("ALTER TABLE ${mysqlprefix}chatgroupoperator ADD INDEX (operatorid)", $link);
+		}
+
 		if (in_array("${mysqlprefix}chatmessage.idx_agentid", $absent_indexes)) {
 			runsql("ALTER TABLE ${mysqlprefix}chatmessage ADD INDEX idx_agentid (agentid)", $link);
 		}