diff --git a/lib/req.js b/lib/req.js
index 85264d0..ff6fb46 100644
--- a/lib/req.js
+++ b/lib/req.js
@@ -74,8 +74,9 @@ function reqSerializer (req) {
     _req.query = req.query
     _req.params = req.params
   } else {
-    // req.url.path is  for hapi compat.
-    _req.url = req.path || (req.url ? (req.url.path || req.url) : undefined)
+    const path = req.path
+    // path for safe hapi compat.
+    _req.url = typeof path === 'string' ? path : (req.url ? req.url.path || req.url : undefined)
   }
   _req.headers = req.headers
   _req.remoteAddress = connection && connection.remoteAddress
diff --git a/test/req.test.js b/test/req.test.js
index 4ac9a58..6726e2d 100644
--- a/test/req.test.js
+++ b/test/req.test.js
@@ -252,6 +252,47 @@ test('req.url will be obtained from input request originalUrl when available', f
   }
 })
 
+test('req.url will be obtained from input request url when req path is a function', function (t) {
+  t.plan(1)
+
+  const server = http.createServer(handler)
+  server.unref()
+  server.listen(0, () => {
+    http.get(server.address(), () => {})
+  })
+
+  t.teardown(() => server.close())
+
+  function handler (req, res) {
+    req.path = function () {
+      throw new Error('unexpected invocation')
+    }
+    req.url = '/test'
+    const serialized = serializers.reqSerializer(req)
+    t.equal(serialized.url, '/test')
+    res.end()
+  }
+})
+
+test('req.url being undefined does not throw an error', function (t) {
+  t.plan(1)
+
+  const server = http.createServer(handler)
+  server.unref()
+  server.listen(0, () => {
+    http.get(server.address(), () => {})
+  })
+
+  t.teardown(() => server.close())
+
+  function handler (req, res) {
+    req.url = undefined
+    const serialized = serializers.reqSerializer(req)
+    t.equal(serialized.url, undefined)
+    res.end()
+  }
+})
+
 test('can wrap request serializers', function (t) {
   t.plan(3)