diff --git a/nova/compute/manager.py b/nova/compute/manager.py
index a24743c2044c..09ad4f4fb0b0 100644
--- a/nova/compute/manager.py
+++ b/nova/compute/manager.py
@@ -5366,7 +5366,10 @@ class ComputeManager(manager.Manager):
         else:
             console_info = self.driver.get_vnc_console(ctxt, instance)
 
-        return console_info.port == port
+        # Some drivers may return an int on console_info.port but the port
+        # variable in this method is a string, so cast to be sure we are
+        # comparing the correct types.
+        return str(console_info.port) == port
 
     @wrap_exception()
     @reverts_task_state
diff --git a/nova/tests/unit/compute/test_compute.py b/nova/tests/unit/compute/test_compute.py
index 370033468d94..561d26bf6278 100644
--- a/nova/tests/unit/compute/test_compute.py
+++ b/nova/tests/unit/compute/test_compute.py
@@ -3831,7 +3831,7 @@ class ComputeTestCase(BaseTestCase,
                        fake_driver_get_console)
 
         self.assertTrue(self.compute.validate_console_port(
-            context=self.context, instance=instance, port=5900,
+            context=self.context, instance=instance, port="5900",
             console_type="novnc"))
 
     def test_validate_console_port_spice(self):
@@ -3846,7 +3846,7 @@ class ComputeTestCase(BaseTestCase,
                        fake_driver_get_console)
 
         self.assertTrue(self.compute.validate_console_port(
-            context=self.context, instance=instance, port=5900,
+            context=self.context, instance=instance, port="5900",
             console_type="spice-html5"))
 
     def test_validate_console_port_rdp(self):
@@ -3860,9 +3860,23 @@ class ComputeTestCase(BaseTestCase,
                        fake_driver_get_console)
 
         self.assertTrue(self.compute.validate_console_port(
-            context=self.context, instance=instance, port=5900,
+            context=self.context, instance=instance, port="5900",
             console_type="rdp-html5"))
 
+    def test_validate_console_port_serial(self):
+        self.flags(enabled=True, group='serial_console')
+        instance = self._create_fake_instance_obj()
+
+        def fake_driver_get_console(*args, **kwargs):
+            return ctype.ConsoleSerial(host="fake_host", port=5900)
+
+        self.stub_out("nova.virt.fake.FakeDriver.get_serial_console",
+                       fake_driver_get_console)
+
+        self.assertTrue(self.compute.validate_console_port(
+            context=self.context, instance=instance, port="5900",
+            console_type="serial"))
+
     def test_validate_console_port_mks(self):
         self.flags(enabled=True, group='mks')
         instance = self._create_fake_instance_obj()
@@ -3871,7 +3885,7 @@ class ComputeTestCase(BaseTestCase,
             mock_getmks.return_value = ctype.ConsoleMKS(host="fake_host",
                                                         port=5900)
             result = self.compute.validate_console_port(context=self.context,
-                        instance=instance, port=5900, console_type="webmks")
+                        instance=instance, port="5900", console_type="webmks")
             self.assertTrue(result)
 
     def test_validate_console_port_wrong_port(self):