diff --git a/src/bin/dual-iir.rs b/src/bin/dual-iir.rs
index fb128af..5d51632 100644
--- a/src/bin/dual-iir.rs
+++ b/src/bin/dual-iir.rs
@@ -6,10 +6,7 @@ use stm32h7xx_hal as hal;
 
 use stabilizer::hardware;
 
-use miniconf::{
-    embedded_nal::{IpAddr, Ipv4Addr},
-    minimq, Miniconf, MqttInterface,
-};
+use miniconf::{minimq, Miniconf, MqttInterface};
 use serde::Deserialize;
 
 use dsp::iir;
@@ -62,9 +59,12 @@ const APP: () = {
 
         let mqtt_interface = {
             let mqtt_client = {
-                let broker = IpAddr::V4(Ipv4Addr::new(10, 34, 16, 10));
-                minimq::MqttClient::new(broker, "", stabilizer.net.stack)
-                    .unwrap()
+                minimq::MqttClient::new(
+                    hardware::design_parameters::MQTT_BROKER.into(),
+                    "",
+                    stabilizer.net.stack,
+                )
+                .unwrap()
             };
 
             MqttInterface::new(
diff --git a/src/bin/lockin-external.rs b/src/bin/lockin-external.rs
index ebfddd8..306ae45 100644
--- a/src/bin/lockin-external.rs
+++ b/src/bin/lockin-external.rs
@@ -4,10 +4,7 @@
 
 use generic_array::typenum::U4;
 
-use miniconf::{
-    embedded_nal::{IpAddr, Ipv4Addr},
-    minimq, Miniconf, MqttInterface,
-};
+use miniconf::{minimq, Miniconf, MqttInterface};
 use serde::Deserialize;
 
 use dsp::{Accu, Complex, ComplexExt, Lockin, RPLL};
@@ -77,11 +74,12 @@ const APP: () = {
         let (mut stabilizer, _pounder) = setup(c.core, c.device);
 
         let mqtt_interface = {
-            let mqtt_client = {
-                let broker = IpAddr::V4(Ipv4Addr::new(10, 34, 16, 10));
-                minimq::MqttClient::new(broker, "", stabilizer.net.stack)
-                    .unwrap()
-            };
+            let mqtt_client = minimq::MqttClient::new(
+                design_parameters::MQTT_BROKER.into(),
+                "",
+                stabilizer.net.stack,
+            )
+            .unwrap();
 
             MqttInterface::new(
                 mqtt_client,
diff --git a/src/hardware/design_parameters.rs b/src/hardware/design_parameters.rs
index ddc0614..9a4279b 100644
--- a/src/hardware/design_parameters.rs
+++ b/src/hardware/design_parameters.rs
@@ -49,3 +49,6 @@ pub const ADC_SAMPLE_TICKS: u16 = 1 << ADC_SAMPLE_TICKS_LOG2;
 // The desired ADC sample processing buffer size.
 pub const SAMPLE_BUFFER_SIZE_LOG2: u8 = 3;
 pub const SAMPLE_BUFFER_SIZE: usize = 1 << SAMPLE_BUFFER_SIZE_LOG2;
+
+// The MQTT broker IPv4 address
+pub const MQTT_BROKER: [u8; 4] = [10, 34, 16, 10];