diff --git a/system/database/drivers/cubrid/cubrid_driver.php b/system/database/drivers/cubrid/cubrid_driver.php
index 8faa15b..01d0ee3 100644
--- a/system/database/drivers/cubrid/cubrid_driver.php
+++ b/system/database/drivers/cubrid/cubrid_driver.php
@@ -438,7 +438,7 @@
 	 */
 	protected function _from_tables()
 	{
-		if ( ! empty($this->qb_join) && count($this->qb_from) > 0)
+		if ( ! empty($this->qb_join) && count($this->qb_from) > 1)
 		{
 			return '('.implode(', ', $this->qb_from).')';
 		}
diff --git a/system/database/drivers/mysql/mysql_driver.php b/system/database/drivers/mysql/mysql_driver.php
index 9831187..7262591 100644
--- a/system/database/drivers/mysql/mysql_driver.php
+++ b/system/database/drivers/mysql/mysql_driver.php
@@ -474,7 +474,7 @@
 	 */
 	protected function _from_tables()
 	{
-		if ( ! empty($this->qb_join) && count($this->qb_from) > 0)
+		if ( ! empty($this->qb_join) && count($this->qb_from) > 1)
 		{
 			return '('.implode(', ', $this->qb_from).')';
 		}
diff --git a/system/database/drivers/mysqli/mysqli_driver.php b/system/database/drivers/mysqli/mysqli_driver.php
index 291ad16..b5a1e26 100644
--- a/system/database/drivers/mysqli/mysqli_driver.php
+++ b/system/database/drivers/mysqli/mysqli_driver.php
@@ -484,7 +484,7 @@
 	 */
 	protected function _from_tables()
 	{
-		if ( ! empty($this->qb_join) && count($this->qb_from) > 0)
+		if ( ! empty($this->qb_join) && count($this->qb_from) > 1)
 		{
 			return '('.implode(', ', $this->qb_from).')';
 		}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_cubrid_driver.php b/system/database/drivers/pdo/subdrivers/pdo_cubrid_driver.php
index 788274a..cb18a5c 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_cubrid_driver.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_cubrid_driver.php
@@ -191,7 +191,7 @@
 	 */
 	protected function _from_tables()
 	{
-		if ( ! empty($this->qb_join) && count($this->qb_from) > 0)
+		if ( ! empty($this->qb_join) && count($this->qb_from) > 1)
 		{
 			return '('.implode(', ', $this->qb_from).')';
 		}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php b/system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php
index 6988266..4244688 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php
@@ -219,7 +219,7 @@
 	 */
 	protected function _from_tables()
 	{
-		if ( ! empty($this->qb_join) && count($this->qb_from) > 0)
+		if ( ! empty($this->qb_join) && count($this->qb_from) > 1)
 		{
 			return '('.implode(', ', $this->qb_from).')';
 		}