diff --git a/connectivity/nanostack/include/nanostack-interface/Nanostack.h b/connectivity/nanostack/include/nanostack-interface/Nanostack.h
index 5749e6628f..84bb7f5420 100644
--- a/connectivity/nanostack/include/nanostack-interface/Nanostack.h
+++ b/connectivity/nanostack/include/nanostack-interface/Nanostack.h
@@ -43,9 +43,6 @@ public:
     nsapi_error_t add_ethernet_interface(EMAC &emac, bool default_if, OnboardNetworkStack::Interface **interface_out) override;
     nsapi_error_t add_ethernet_interface(EMAC &emac, bool default_if, OnboardNetworkStack::Interface **interface_out, const uint8_t *mac_addr) override;
 
-    /* Local variant */
-    nsapi_error_t add_ethernet_interface_ns(EMAC &emac, bool default_if, Nanostack::EthernetInterface **interface_out, const uint8_t *mac_addr = NULL);
-
     nsapi_error_t add_ppp_interface(PPP &ppp, bool default_if, OnboardNetworkStack::Interface **interface_out) override;
 
     /* Local variant with stronger typing and manual address specification */
diff --git a/connectivity/nanostack/mbed-mesh-api/source/NanostackEMACInterface.cpp b/connectivity/nanostack/mbed-mesh-api/source/NanostackEMACInterface.cpp
index da78854f6b..63d9cae6ee 100644
--- a/connectivity/nanostack/mbed-mesh-api/source/NanostackEMACInterface.cpp
+++ b/connectivity/nanostack/mbed-mesh-api/source/NanostackEMACInterface.cpp
@@ -191,7 +191,7 @@ void EMACPhy::set_mac_address(uint8_t *mac)
     memcpy(mac_addr, mac, sizeof mac_addr);
 }
 
-nsapi_error_t Nanostack::add_ethernet_interface_ns(EMAC &emac, bool default_if, Nanostack::EthernetInterface **interface_out, const uint8_t *mac_addr)
+nsapi_error_t Nanostack::add_ethernet_interface(EMAC &emac, bool default_if, OnboardNetworkStack::Interface **interface_out, const uint8_t *mac_addr)
 {
     if (single_phy) {
         return NSAPI_ERROR_DEVICE_ERROR;
@@ -222,15 +222,6 @@ nsapi_error_t Nanostack::add_ethernet_interface_ns(EMAC &emac, bool default_if,
     *interface_out = interface;
 
     return NSAPI_ERROR_OK;
-
-}
-
-nsapi_error_t Nanostack::add_ethernet_interface(EMAC &emac, bool default_if, OnboardNetworkStack::Interface **interface_out, const uint8_t *mac_addr)
-{
-    Nanostack::EthernetInterface *interface;
-    nsapi_error_t err = add_ethernet_interface_ns(emac, default_if, &interface, mac_addr);
-    *interface_out = interface;
-    return err;
 }
 
 nsapi_error_t Nanostack::add_ethernet_interface(EMAC &emac, bool default_if, OnboardNetworkStack::Interface **interface_out)