diff --git a/system/database/drivers/pdo/pdo_driver.php b/system/database/drivers/pdo/pdo_driver.php
index 37090cb..34adf0f 100644
--- a/system/database/drivers/pdo/pdo_driver.php
+++ b/system/database/drivers/pdo/pdo_driver.php
@@ -257,42 +257,20 @@
 	// --------------------------------------------------------------------
 
 	/**
-	 * Escape String
+	 * Platform-dependant string escape
 	 *
-	 * @param	string	$str
-	 * @param	bool	$like	Whether or not the string will be used in a LIKE condition
+	 * @param	string
 	 * @return	string
 	 */
-	public function escape_str($str, $like = FALSE)
+	protected function _escape_str($str)
 	{
-		if (is_array($str))
-		{
-			foreach ($str as $key => $val)
-			{
-				$str[$key] = $this->escape_str($val, $like);
-			}
-
-			return $str;
-		}
-
 		// Escape the string
 		$str = $this->conn_id->quote($str);
 
 		// If there are duplicated quotes, trim them away
-		if ($str[0] === "'")
-		{
-			$str = substr($str, 1, -1);
-		}
-
-		// escape LIKE condition wildcards
-		if ($like === TRUE)
-		{
-			return str_replace(array($this->_like_escape_chr, '%', '_'),
-						array($this->_like_escape_chr.$this->_like_escape_chr, $this->_like_escape_chr.'%', $this->_like_escape_chr.'_'),
-						$str);
-		}
-
-		return $str;
+		return ($str[0] === "'")
+			? substr($str, 1, -1)
+			: $str;
 	}
 
 	// --------------------------------------------------------------------