diff --git a/src/virtual_iface/tcp.rs b/src/virtual_iface/tcp.rs
index 7522d7e..39d45ac 100644
--- a/src/virtual_iface/tcp.rs
+++ b/src/virtual_iface/tcp.rs
@@ -94,7 +94,9 @@ impl VirtualInterfacePoll for TcpVirtualInterface {
         let mut iface = Interface::new(config, &mut device, Instant::now());
         iface.update_ip_addrs(|ip_addrs| {
             addresses.into_iter().for_each(|addr| {
-                ip_addrs.push(addr).unwrap();
+                ip_addrs
+                    .push(addr)
+                    .expect("maximum number of IPs in TCP interface reached");
             });
         });
 
diff --git a/src/virtual_iface/udp.rs b/src/virtual_iface/udp.rs
index 3ca4c2d..c72c51c 100644
--- a/src/virtual_iface/udp.rs
+++ b/src/virtual_iface/udp.rs
@@ -106,7 +106,9 @@ impl VirtualInterfacePoll for UdpVirtualInterface {
         let mut iface = Interface::new(config, &mut device, Instant::now());
         iface.update_ip_addrs(|ip_addrs| {
             addresses.into_iter().for_each(|addr| {
-                ip_addrs.push(addr).unwrap();
+                ip_addrs
+                    .push(addr)
+                    .expect("maximum number of IPs in UDP interface reached");
             });
         });