diff --git a/system/database/drivers/oci8/oci8_driver.php b/system/database/drivers/oci8/oci8_driver.php
index c662190..057095c 100644
--- a/system/database/drivers/oci8/oci8_driver.php
+++ b/system/database/drivers/oci8/oci8_driver.php
@@ -398,10 +398,9 @@
 	/**
 	 * Escape String
 	 *
-	 * @access  public
-	 * @param   string
+	 * @param	string
 	 * @param	bool	whether or not the string will be used in a LIKE condition
-	 * @return  string
+	 * @return	string
 	 */
 	public function escape_str($str, $like = FALSE)
 	{
@@ -415,15 +414,14 @@
 			return $str;
 		}
 
-		$str = remove_invisible_characters($str);
-		$str = str_replace("'", "''", $str);
+		$str = str_replace("'", "''", remove_invisible_characters($str));
 
 		// 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),
-								$str);
+			return str_replace(array($this->_like_escape_chr, '%', '_'),
+						array($this->_like_escape_chr.$this->_like_escape_chr, $this->_like_escape_chr.'%', $this->_like_escape_chr.'_'),
+						$str);
 		}
 
 		return $str;
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index d6a9f0d..e8bbf7d 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -112,6 +112,7 @@
 -  Fixed a bug (#1039) - MySQL's _backup() method failed due to a table name not being escaped.
 -  Fixed a bug (#1070) - CI_DB_driver::initialize() didn't set a character set if a database is not selected.
 -  Fixed a bug (#177) - CI_Form_validation::set_value() didn't set the default value if POST data is NULL.
+-  Fixed a bug (#68, #414) - Oracle's escape_str() didn't properly escape LIKE wild characters.
 
 
 Version 2.1.1