diff --git a/system/database/DB_active_rec.php b/system/database/DB_active_rec.php
index 3cb3982..dcf9d38 100644
--- a/system/database/DB_active_rec.php
+++ b/system/database/DB_active_rec.php
@@ -1394,27 +1394,7 @@
 	{
 		return $this->from($table);
 	}
-	
-	// --------------------------------------------------------------------
 
-	/**
-	 * Tests whether the string has an SQL operator
-	 *
-	 * @access	private
-	 * @param	string
-	 * @return	bool
-	 */
-	function _has_operator($str)
-	{
-		$str = trim($str);
-		if ( ! preg_match("/(\s|<|>|!|=|is null|is not null)/i", $str))
-		{
-			return FALSE;
-		}
-
-		return TRUE;
-	}
-	
 	// --------------------------------------------------------------------
 
 	/**
diff --git a/system/database/DB_driver.php b/system/database/DB_driver.php
index eeaf6ea..60f51d7 100644
--- a/system/database/DB_driver.php
+++ b/system/database/DB_driver.php
@@ -933,7 +933,9 @@
 	function update_string($table, $data, $where)
 	{
 		if ($where == '')
+		{
 			return false;
+		}
 					
 		$fields = array();
 		foreach($data as $key => $val)
@@ -972,6 +974,26 @@
 	// --------------------------------------------------------------------
 
 	/**
+	 * Tests whether the string has an SQL operator
+	 *
+	 * @access	private
+	 * @param	string
+	 * @return	bool
+	 */
+	function _has_operator($str)
+	{
+		$str = trim($str);
+		if ( ! preg_match("/(\s|<|>|!|=|is null|is not null)/i", $str))
+		{
+			return FALSE;
+		}
+
+		return TRUE;
+	}
+	
+	// --------------------------------------------------------------------
+
+	/**
 	 * Prep the table name - simply adds the table prefix if needed
 	 *
 	 * @access	public
diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index 2188c12..5fa7c60 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -64,7 +64,7 @@
 	<li>Database
 		<ul>
 			<li>Added ability to set additional database config values in <a href="database/connecting.html">DSN connections</a> via the query string.</li>
-		</ul>
+			</ul>
 	</li>
 	<li>Libraries
 		<ul>
@@ -85,6 +85,7 @@
 
 <ul>
 	<li>Amended fixes for bug (#3419) with parsing DSN database connections.</li>
+	<li>Moved the _has_operators() function (#4535) into DB_driver from DB_active_rec.</li>
 	<li>Fixed a syntax error in upload_lang.php.</li>
 	<li>Fixed a bug (#4542) with a regular expression in the Image library.</li>
 </ul>