diff --git a/artiq/firmware/libboard_misoc/net_settings.rs b/artiq/firmware/libboard_misoc/net_settings.rs
index 2b69d9262..20b204c80 100644
--- a/artiq/firmware/libboard_misoc/net_settings.rs
+++ b/artiq/firmware/libboard_misoc/net_settings.rs
@@ -1,13 +1,21 @@
 use core::fmt;
 use core::fmt::{Display, Formatter};
 use core::str::FromStr;
+use smoltcp::iface::{Interface, InterfaceBuilder};
+use smoltcp::phy::Device;
 
-use smoltcp::wire::{EthernetAddress, IpAddress, Ipv4Address};
+use smoltcp::wire::{EthernetAddress, IpAddress, IpCidr, Ipv4Address, Ipv4Cidr};
 
 use config;
 #[cfg(soc_platform = "kasli")]
 use i2c_eeprom;
 
+
+const IPV4_INDEX: usize = 0;
+const IPV6_LL_INDEX: usize = 1;
+const IPV6_INDEX: usize = 2;
+const IP_ADDRESS_STORAGE_SIZE: usize = 3;
+
 pub enum Ipv4AddrConfig {
     UseDhcp,
     Static(Ipv4Address),
@@ -101,3 +109,33 @@ pub fn get_adresses() -> NetAddresses {
         ipv6_addr: ipv6_addr
     }
 }
+
+pub trait InterfaceBuilderEx {
+    fn init_ip_addrs(self, net_addresses: &NetAddresses) -> Self;
+}
+
+impl<'a, DeviceT: for<'d> Device<'d>> InterfaceBuilderEx for InterfaceBuilder<'a, DeviceT> {
+    fn init_ip_addrs(self, net_addresses: &NetAddresses) -> Self {
+        let mut storage = [
+            IpCidr::new(IpAddress::Ipv4(Ipv4Address::UNSPECIFIED), 0);  IP_ADDRESS_STORAGE_SIZE
+        ];
+        if let Ipv4AddrConfig::Static(ipv4) = net_addresses.ipv4_addr {
+            storage[IPV4_INDEX] = IpCidr::new(IpAddress::Ipv4(ipv4), 0);
+        }
+        storage[IPV6_LL_INDEX] = IpCidr::new(net_addresses.ipv6_ll_addr, 0);
+        if let Some(ipv6) = net_addresses.ipv6_addr {
+            storage[IPV6_INDEX] = IpCidr::new(ipv6, 0);
+        }
+        self.ip_addrs(storage)
+    }
+}
+
+pub trait InterfaceEx {
+    fn update_ipv4_addr(&mut self, addr: &Ipv4Cidr);
+}
+
+impl<'a, DeviceT: for<'d> Device<'d>> InterfaceEx for Interface<'a, DeviceT> {
+    fn update_ipv4_addr(&mut self, addr: &Ipv4Cidr) {
+        self.update_ip_addrs(|storage| storage[IPV4_INDEX] = IpCidr::Ipv4(*addr))
+    }
+}
diff --git a/artiq/firmware/runtime/ip_addr_storage.rs b/artiq/firmware/runtime/ip_addr_storage.rs
deleted file mode 100644
index 310c21941..000000000
--- a/artiq/firmware/runtime/ip_addr_storage.rs
+++ /dev/null
@@ -1,40 +0,0 @@
-use smoltcp::iface::{Interface, InterfaceBuilder};
-use smoltcp::phy::Device;
-use smoltcp::wire::{IpAddress, IpCidr, Ipv4Address, Ipv4Cidr};
-use board_misoc::net_settings::{Ipv4AddrConfig, NetAddresses};
-
-
-const IPV4_INDEX: usize = 0;
-const IPV6_LL_INDEX: usize = 1;
-const IPV6_INDEX: usize = 2;
-const IP_ADDRESS_STORAGE_SIZE: usize = 3;
-
-pub trait InterfaceBuilderEx {
-    fn init_ip_addrs(self, net_addresses: &NetAddresses) -> Self;
-}
-
-impl<'a, DeviceT: for<'d> Device<'d>> InterfaceBuilderEx for InterfaceBuilder<'a, DeviceT> {
-    fn init_ip_addrs(self, net_addresses: &NetAddresses) -> Self {
-        let mut storage = [
-            IpCidr::new(IpAddress::Ipv4(Ipv4Address::UNSPECIFIED), 0);  IP_ADDRESS_STORAGE_SIZE
-        ];
-        if let Ipv4AddrConfig::Static(ipv4) = net_addresses.ipv4_addr {
-            storage[IPV4_INDEX] = IpCidr::new(IpAddress::Ipv4(ipv4), 0);
-        }
-        storage[IPV6_LL_INDEX] = IpCidr::new(net_addresses.ipv6_ll_addr, 0);
-        if let Some(ipv6) = net_addresses.ipv6_addr {
-            storage[IPV6_INDEX] = IpCidr::new(ipv6, 0);
-        }
-        self.ip_addrs(storage)
-    }
-}
-
-pub trait InterfaceEx {
-    fn update_ipv4_addr(&mut self, addr: &Ipv4Cidr);
-}
-
-impl<'a, DeviceT: for<'d> Device<'d>> InterfaceEx for Interface<'a, DeviceT> {
-    fn update_ipv4_addr(&mut self, addr: &Ipv4Cidr) {
-        self.update_ip_addrs(|storage| storage[IPV4_INDEX] = IpCidr::Ipv4(*addr))
-    }
-}
diff --git a/artiq/firmware/runtime/main.rs b/artiq/firmware/runtime/main.rs
index b36fd9251..f1e7e7108 100644
--- a/artiq/firmware/runtime/main.rs
+++ b/artiq/firmware/runtime/main.rs
@@ -32,7 +32,7 @@ use smoltcp::wire::HardwareAddress;
 use board_misoc::{csr, ident, clock, spiflash, config, net_settings, pmp, boot};
 #[cfg(has_ethmac)]
 use board_misoc::ethmac;
-use board_misoc::net_settings::{Ipv4AddrConfig};
+use board_misoc::net_settings::{Ipv4AddrConfig, InterfaceBuilderEx};
 #[cfg(has_drtio)]
 use board_artiq::drtioaux;
 use board_artiq::drtio_routing;
@@ -42,7 +42,6 @@ use proto_artiq::{mgmt_proto, moninj_proto, rpc_proto, session_proto, kernel_pro
 use proto_artiq::analyzer_proto;
 
 use riscv::register::{mcause, mepc, mtval};
-use ip_addr_storage::InterfaceBuilderEx;
 
 mod rtio_clocking;
 mod rtio_mgt;
@@ -61,7 +60,6 @@ mod moninj;
 #[cfg(has_rtio_analyzer)]
 mod analyzer;
 mod dhcp;
-mod ip_addr_storage;
 
 #[cfg(has_grabber)]
 fn grabber_thread(io: sched::Io) {
diff --git a/artiq/firmware/runtime/sched.rs b/artiq/firmware/runtime/sched.rs
index 1f9c79bc2..a31c6ec43 100644
--- a/artiq/firmware/runtime/sched.rs
+++ b/artiq/firmware/runtime/sched.rs
@@ -16,7 +16,7 @@ use board_misoc::clock;
 use urc::Urc;
 use board_misoc::ethmac::EthernetDevice;
 use smoltcp::phy::Tracer;
-use ip_addr_storage::InterfaceEx;
+use board_misoc::net_settings::InterfaceEx;
 
 #[derive(Fail, Debug)]
 pub enum Error {