diff --git a/rust/relay/server/src/ebpf/linux.rs b/rust/relay/server/src/ebpf/linux.rs
index 1cf9d7a95..e217e7b94 100644
--- a/rust/relay/server/src/ebpf/linux.rs
+++ b/rust/relay/server/src/ebpf/linux.rs
@@ -20,7 +20,7 @@ pub struct Program {
 }
 
 impl Program {
-    pub fn try_load(interface: &'static str) -> Result<Self> {
+    pub fn try_load(interface: &str) -> Result<Self> {
         let mut ebpf = aya::Ebpf::load(aya::include_bytes_aligned!(concat!(
             env!("OUT_DIR"),
             "/ebpf-turn-router-main"
diff --git a/rust/relay/server/src/main.rs b/rust/relay/server/src/main.rs
index ffe71b22b..b6d64f336 100644
--- a/rust/relay/server/src/main.rs
+++ b/rust/relay/server/src/main.rs
@@ -82,6 +82,10 @@ struct Args {
     #[arg(long, env, hide = true)]
     google_cloud_project_id: Option<String>,
 
+    /// Which interface to load the eBPF program onto.
+    #[arg(long, env, hide = true, default_value = "eth0")]
+    primary_interface: String,
+
     #[command(flatten)]
     health_check: http_health_check::HealthCheckArgs,
 
@@ -132,7 +136,7 @@ fn main() {
 async fn try_main(args: Args) -> Result<()> {
     setup_tracing(&args)?;
 
-    let mut ebpf = ebpf::Program::try_load("eth0")
+    let mut ebpf = ebpf::Program::try_load(&args.primary_interface)
         .inspect_err(|e| tracing::info!("Failed to load eBPF TURN router: {e:#}"))
         .ok();