diff --git a/client/src/main.rs b/client/src/main.rs
index 8ec5f50..56cd9a4 100644
--- a/client/src/main.rs
+++ b/client/src/main.rs
@@ -284,7 +284,10 @@ fn install(
 
     let target_conf = CLIENT_CONFIG_DIR.join(&iface).with_extension("conf");
     if target_conf.exists() {
-        bail!("An interface with this name already exists in innernet.");
+        bail!("An existing innernet network with the name \"{}\" already exists.", iface);
+    }
+    if Device::list(network.backend)?.iter().any(|name| name.as_str_lossy() == iface) {
+        bail!("An existing WireGuard interface with the name \"{}\" already exists.", iface);
     }
 
     let iface = iface.parse()?;