diff --git a/sys/include/config.h b/sys/include/config.h
index 8b83786cc7..c2162419a0 100644
--- a/sys/include/config.h
+++ b/sys/include/config.h
@@ -40,11 +40,13 @@ extern char configmem[];
  * @brief  Stores configuration data of the node.
  */
 typedef struct {
+    /* cppcheck-suppress unusedStructMember : is used in sys/shell/commands/sc_id.c  */
     uint16_t id;                    /**< unique node identifier          */
 #ifdef HAS_RADIO
     radio_address_t radio_address;  /**< address for radio communication */
     uint8_t radio_channel;          /**< current frequency               */
 #endif
+    /* cppcheck-suppress unusedStructMember : useful for debug purposes */
     char name[CONFIG_NAME_LEN];     /**< name of the node                */
 } config_t;
 
@@ -52,6 +54,7 @@ typedef struct {
  * @brief  Element to store in flashrom.
  */
 typedef struct {
+    /* cppcheck-suppress unusedStructMember : magic_key is only read directly from ROM */
     uint16_t magic_key;         /**< validity check           */
     config_t config;            /**< the node's configuration */
 } configmem_t;