diff --git a/lib/usbmux/index.js b/lib/usbmux/index.js
index 2687d99..0742bb3 100644
--- a/lib/usbmux/index.js
+++ b/lib/usbmux/index.js
@@ -11,6 +11,7 @@ import PlistService from '../plist-service';
 import { Lockdown, LOCKDOWN_PORT } from '../lockdown';
 import { BaseServiceSocket } from '../base-service';
 import { MB } from '../constants';
+import log from '../logger';
 
 
 const MAX_FRAME_SIZE = 1 * MB;
@@ -62,25 +63,31 @@ function swap16 (val) {
  * @returns {Promise<NodeJS.Socket>} Connected socket instance
  */
 async function getDefaultSocket(opts = {}) {
-  let {
-    socketPath = DEFAULT_USBMUXD_SOCKET,
-    socketPort = DEFAULT_USBMUXD_PORT,
-    socketHost = DEFAULT_USBMUXD_HOST,
-    timeout = 5000,
-  } = opts;
+  const defaults = {
+    socketPath: DEFAULT_USBMUXD_SOCKET,
+    socketPort: DEFAULT_USBMUXD_PORT,
+    socketHost: DEFAULT_USBMUXD_HOST,
+    timeout: 5000
+  };
 
   if (process.env.USBMUXD_SOCKET_ADDRESS) {
+    log.debug(`Using USBMUXD_SOCKET_ADDRESS environment variable as default socket: ${process.env.USBMUXD_SOCKET_ADDRESS}`);
     // "unix:" or "UNIX:" prefix is optional for unix socket paths.
     const usbmuxdSocketAddress = process.env.USBMUXD_SOCKET_ADDRESS.replace(/^(unix|UNIX):/i, '');
-    let ipPortPair = usbmuxdSocketAddress.split(':');
-    if (ipPortPair.length === 2) {
-      socketHost = ipPortPair[0];
-      socketPort = parseInt(ipPortPair[1], 10);
+    const [ip, port] = usbmuxdSocketAddress.split(':');
+    if (ip && port) {
+      defaults.socketPath = null;
+      defaults.socketHost = ip;
+      defaults.socketPort = parseInt(port, 10);
     } else {
-      socketPath = usbmuxdSocketAddress;
+      defaults.socketPath = usbmuxdSocketAddress;
+      defaults.socketHost = null;
+      defaults.socketPort = null;
     }
   }
 
+  const { socketPath, socketPort, socketHost, timeout } = { ...defaults, ...opts };
+
   let socket;
   if (await fs.exists(socketPath ?? '')) {
     socket = net.createConnection(socketPath ?? '');