diff --git a/modules/calendar.php b/modules/calendar.php
index 3c34619e..82813f6f 100644
--- a/modules/calendar.php
+++ b/modules/calendar.php
@@ -712,15 +712,17 @@ class calendar extends module_base
 	}
 
 	/**
-	* Unserialize links array
-	*
-	* @param string $serial_str Serialized string
-	*
-	* @return array Unserialized array
-	*/
-	protected function utf_unserialize($serial_str)
+	 * Unserialize links array
+	 *
+	 * @param string $serial_str Serialized string
+	 *
+	 * @return array Unserialized string
+	 */
+	private function utf_unserialize($serial_str)
 	{
-		$out = preg_replace('!s:(\d+):"(.*?)";!se', "'s:'.strlen('$2').':\"$2\";'", $serial_str );
+		$out = preg_replace_callback('!s:(\d+):"(.*?)";!s', function ($result) {
+			return 's:' . strlen($result[2]) . ":\"{$result[2]}\";";
+		}, $serial_str);
 		return unserialize($out);
 	}
 
diff --git a/modules/links.php b/modules/links.php
index 96eea0d5..2db14e1c 100644
--- a/modules/links.php
+++ b/modules/links.php
@@ -462,15 +462,17 @@ class links extends module_base
 	}
 
 	/**
-	* Unserialize links array
-	*
-	* @param string $serial_str Serialized string
-	*
-	* @return array Unserialized string
-	*/
+	 * Unserialize links array
+	 *
+	 * @param string $serial_str Serialized string
+	 *
+	 * @return array Unserialized string
+	 */
 	private function utf_unserialize($serial_str)
 	{
-		$out = preg_replace('!s:(\d+):"(.*?)";!se', "'s:'.strlen('$2').':\"$2\";'", $serial_str);
+		$out = preg_replace_callback('!s:(\d+):"(.*?)";!s', function ($result) {
+			return 's:' . strlen($result[2]) . ":\"{$result[2]}\";";
+		}, $serial_str);
 		return unserialize($out);
 	}
 }
diff --git a/modules/main_menu.php b/modules/main_menu.php
index 3c833348..d533ee12 100644
--- a/modules/main_menu.php
+++ b/modules/main_menu.php
@@ -526,12 +526,12 @@ class main_menu extends module_base
 	}
 
 	/**
-	* Unserialize links array
-	*
-	* @param string $serial_str Serialized string
-	*
-	* @return array Unserialized string
-	*/
+	 * Unserialize links array
+	 *
+	 * @param string $serial_str Serialized string
+	 *
+	 * @return array Unserialized string
+	 */
 	private function utf_unserialize($serial_str)
 	{
 		$out = preg_replace_callback('!s:(\d+):"(.*?)";!s', function ($result) {