diff --git a/boards/avr-rss2/include/eui_provider_params.h b/boards/avr-rss2/include/eui_provider_params.h
index b19004faae..fad4dbb736 100644
--- a/boards/avr-rss2/include/eui_provider_params.h
+++ b/boards/avr-rss2/include/eui_provider_params.h
@@ -27,10 +27,8 @@ extern "C" {
 /**
  * @brief    AT24Mac provides a EUI-64, this is also printed on the board
  */
-static inline int _at24mac_get_eui64(const void *arg, eui64_t *addr, uint8_t index)
+static inline int _at24mac_get_eui64(uint8_t index, eui64_t *addr)
 {
-    (void) arg;
-
     return at24mac_get_eui64(index, addr);
 }
 
diff --git a/boards/derfmega256/include/eui_provider_params.h b/boards/derfmega256/include/eui_provider_params.h
index cb01d1f02f..5bc489d845 100644
--- a/boards/derfmega256/include/eui_provider_params.h
+++ b/boards/derfmega256/include/eui_provider_params.h
@@ -34,9 +34,8 @@ extern "C" {
 /**
  * @brief    Constant in EEPROM provides a EUI-64, this is also printed on the board
  */
-static inline int _eeprom_mac_get_eui64(const void *arg, eui64_t *addr, uint8_t index)
+static inline int _eeprom_mac_get_eui64(uint8_t index, eui64_t *addr)
 {
-    (void) arg;
     (void) index;
 
     if (eeprom_read(EEPROM_MAC_ADDR, addr, sizeof(eui64_t)) != sizeof(eui64_t)) {
diff --git a/boards/same54-xpro/include/eui_provider_params.h b/boards/same54-xpro/include/eui_provider_params.h
index 5e8c8b503b..fbb7471c26 100644
--- a/boards/same54-xpro/include/eui_provider_params.h
+++ b/boards/same54-xpro/include/eui_provider_params.h
@@ -27,10 +27,8 @@ extern "C" {
 /**
  * @brief    AT24Mac provides a EUI-48
  */
-static inline int _at24mac_get_eui48(const void *arg, eui48_t *addr, uint8_t index)
+static inline int _at24mac_get_eui48(uint8_t index, eui48_t *addr)
 {
-    (void) arg;
-
     return at24mac_get_eui48(index, addr);
 }
 
diff --git a/boards/samr21-xpro/include/eui_provider_params.h b/boards/samr21-xpro/include/eui_provider_params.h
index dce5328686..8309c0acf2 100644
--- a/boards/samr21-xpro/include/eui_provider_params.h
+++ b/boards/samr21-xpro/include/eui_provider_params.h
@@ -27,9 +27,8 @@ extern "C" {
 /**
  * @brief    EDBG provides a EUI-64, the same that is printed on the board
  */
-static inline int _edbg_get_eui64(const void *arg, eui64_t *addr, uint8_t index)
+static inline int _edbg_get_eui64(uint8_t index, eui64_t *addr)
 {
-    (void) arg;
     (void) index;
 
     /* EDBG can take a while to respond on cold boot */
diff --git a/sys/include/net/eui_provider.h b/sys/include/net/eui_provider.h
index 4c99db72d5..44f46a2d9d 100644
--- a/sys/include/net/eui_provider.h
+++ b/sys/include/net/eui_provider.h
@@ -106,35 +106,32 @@ extern "C" {
 /**
  * @brief   Function for providing a EUI-48 to a device
  *
- * @param[in]   arg     Optional argument provided by eui48_conf_t
- * @param[out]  addr    Destination pointer for the EUI-48 address
  * @param[in]   index   index of the netdev
+ * @param[out]  addr    Destination pointer for the EUI-48 address
  *
  * @return      0 on success, next provider in eui48_conf_t will be
  *              used otherwise.
  *              Will fall back to @see luid_get_eui48 eventually.
  */
-typedef int (*netdev_get_eui48_cb_t)(const void *arg, eui48_t *addr, uint8_t index);
+typedef int (*netdev_get_eui48_cb_t)(uint8_t index, eui48_t *addr);
 
 /**
  * @brief   Function for providing a EUI-64 to a device
  *
- * @param[in]   arg     Optional argument provided by eui64_conf_t
- * @param[out]  addr    Destination pointer for the EUI-64 address
  * @param[in]   index   index of the netdev
+ * @param[out]  addr    Destination pointer for the EUI-64 address
  *
  * @return      0 on success, next provider in eui64_conf_t will be
  *              used otherwise.
  *              Will fall back to @see luid_get_eui64 eventually.
  */
-typedef int (*netdev_get_eui64_cb_t)(const void *arg, eui64_t *addr, uint8_t index);
+typedef int (*netdev_get_eui64_cb_t)(uint8_t index, eui64_t *addr);
 
 /**
  * @brief Structure to hold providers for EUI-48 addresses
  */
 typedef struct {
     netdev_get_eui48_cb_t provider; /**< function to provide an EUI-48                  */
-    const void *arg;                /**< argument to the provider function              */
     netdev_type_t type;             /**< device type to match or `NETDEV_ANY`           */
     uint8_t index;                  /**< device index to match or `NETDEV_INDEX_ANY`    */
 } eui48_conf_t;
@@ -144,7 +141,6 @@ typedef struct {
  */
 typedef struct {
     netdev_get_eui64_cb_t provider; /**< function to provide an EUI-64                  */
-    const void *arg;                /**< argument to the provider function              */
     netdev_type_t type;             /**< device type to match or `NETDEV_ANY`           */
     uint8_t index;                  /**< device index to match or `NETDEV_INDEX_ANY`    */
 } eui64_conf_t;
diff --git a/sys/net/link_layer/eui_provider/eui_provider.c b/sys/net/link_layer/eui_provider/eui_provider.c
index d99475ab0f..54e348ff11 100644
--- a/sys/net/link_layer/eui_provider/eui_provider.c
+++ b/sys/net/link_layer/eui_provider/eui_provider.c
@@ -35,7 +35,7 @@ void netdev_eui48_get(netdev_t *netdev, eui48_t *addr)
 #else
         (void) netdev;
 #endif
-        if (eui48_conf[i].provider(eui48_conf[i].arg, addr, i) == 0) {
+        if (eui48_conf[i].provider(i, addr) == 0) {
             return;
         }
     }
@@ -60,7 +60,7 @@ void netdev_eui64_get(netdev_t *netdev, eui64_t *addr)
 #else
         (void) netdev;
 #endif
-        if (eui64_conf[i].provider(eui64_conf[i].arg, addr, i) == 0) {
+        if (eui64_conf[i].provider(i, addr) == 0) {
             return;
         }
     }
diff --git a/sys/net/link_layer/eui_provider/include/eui48_provider_params.h b/sys/net/link_layer/eui_provider/include/eui48_provider_params.h
index a7dd76d8d1..fc1bc946c2 100644
--- a/sys/net/link_layer/eui_provider/include/eui48_provider_params.h
+++ b/sys/net/link_layer/eui_provider/include/eui48_provider_params.h
@@ -40,13 +40,6 @@ extern "C" {
 #endif
 #endif
 
-/**
- * @brief Optional function argument to `netdev_get_eui48_cb_t`
- */
-#ifndef EUI48_PROVIDER_ARG
-#define EUI48_PROVIDER_ARG    NULL
-#endif
-
 /**
  * @brief Driver type to match with EUI-48 provider
  */
@@ -68,7 +61,6 @@ extern "C" {
 #ifndef EUI48_PROVIDER_PARAMS
 #define EUI48_PROVIDER_PARAMS     {                                \
                                  .provider = EUI48_PROVIDER_FUNC,  \
-                                 .arg      = EUI48_PROVIDER_ARG,   \
                                  .type     = EUI48_PROVIDER_TYPE,  \
                                  .index    = EUI48_PROVIDER_INDEX, \
                                 },
diff --git a/sys/net/link_layer/eui_provider/include/eui64_provider_params.h b/sys/net/link_layer/eui_provider/include/eui64_provider_params.h
index bd630cb2fa..d685694758 100644
--- a/sys/net/link_layer/eui_provider/include/eui64_provider_params.h
+++ b/sys/net/link_layer/eui_provider/include/eui64_provider_params.h
@@ -40,13 +40,6 @@ extern "C" {
 #endif
 #endif
 
-/**
- * @brief Optional function argument to `netdev_get_eui64_cb_t`
- */
-#ifndef EUI64_PROVIDER_ARG
-#define EUI64_PROVIDER_ARG    NULL
-#endif
-
 /**
  * @brief Driver type to match with EUI-64 provider
  */
@@ -68,7 +61,6 @@ extern "C" {
 #ifndef EUI64_PROVIDER_PARAMS
 #define EUI64_PROVIDER_PARAMS     {                                \
                                  .provider = EUI64_PROVIDER_FUNC,  \
-                                 .arg      = EUI64_PROVIDER_ARG,   \
                                  .type     = EUI64_PROVIDER_TYPE,  \
                                  .index    = EUI64_PROVIDER_INDEX, \
                                 },