diff --git a/sys/doc.txt b/sys/doc.txt
index ee4a2fca9d0b9daa80d0d997830b7d33aedfda35..12497fb07bd29977fd7babbebc525a24595ccc69 100644
--- a/sys/doc.txt
+++ b/sys/doc.txt
@@ -34,3 +34,9 @@
  * @ingroup     sys
  * @brief       Provides memory management implementations and utilities
  */
+
+/**
+ * @defgroup    sys_serialization Serialization
+ * @ingroup     sys
+ * @brief       Utilities for data serialization
+ */