diff --git a/cpu/samd21/doc.txt b/cpu/samd21/doc.txt
index a8453ff285..1c8b006dee 100644
--- a/cpu/samd21/doc.txt
+++ b/cpu/samd21/doc.txt
@@ -1,9 +1,9 @@
 /**
- * @defgroup        cpu_samd21 Atmel SAMD21
+ * @defgroup        cpu_samd21 Atmel SAMD10/SAMD20/SAMD21/SAMR21
  * @ingroup         cpu
- * @brief           Atmel SAMD21 Cortex-M0 MCU specific implementation.
+ * @brief           Atmel SAMD1x/SAMD2x Cortex-M0+ MCU specific implementation.
  *
- * This module contains Atmel SAMD21 specific code and definition.
+ * This module contains Atmel SAMD10/SAMD20/SAMD21/SAMR21 specific code and definition.
  *
  * @see cpu_sam0_common
- */
\ No newline at end of file
+ */