diff --git a/system/database/drivers/mssql/mssql_driver.php b/system/database/drivers/mssql/mssql_driver.php
index 5048c0b..b581a47 100644
--- a/system/database/drivers/mssql/mssql_driver.php
+++ b/system/database/drivers/mssql/mssql_driver.php
@@ -267,9 +267,9 @@
 		// escape LIKE condition wildcards
 		if ($like === TRUE)
 		{
-			$str = 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);
+			$str = 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;