diff --git a/.appveyor.yml b/.appveyor.yml
new file mode 100644
index 0000000..cacbad2
--- /dev/null
+++ b/.appveyor.yml
@@ -0,0 +1,19 @@
+image: Visual Studio 2015
+
+version: build-{build}-{branch}
+
+before_build:
+  - ren "C:\Program Files (x86)\Windows Kits\10\include\00wdf" "wdf"
+  - ren "C:\Program Files (x86)\WiX Toolset v3.11" "WiX Toolset v3.8"
+
+build_script: buildAll.bat
+
+skip_commits:
+  message: /\[ci skip\]/
+
+notifications:
+  - provider: Email
+    to: devel@daynix.com
+    on_build_success: false
+    on_build_failure: false
+    on_build_status_changed: true
diff --git a/README.md b/README.md
index 238f57e..c1a5b23 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
+[![Build Status](https://ci.appveyor.com/api/projects/status/github/daynix/usbdk?branch=master&svg=true)](https://ci.appveyor.com/project/daynix/usbdk)
+
 # UsbDk
 
 UsbDk (USB Development Kit) is a open-source library for Windows meant
diff --git a/UsbDk/FilterDevice.cpp b/UsbDk/FilterDevice.cpp
index ee04720..ad81840 100644
--- a/UsbDk/FilterDevice.cpp
+++ b/UsbDk/FilterDevice.cpp
@@ -486,7 +486,7 @@ NTSTATUS CUsbDkFilterDevice::DefineStrategy()
         return status;
     }
 
-    if (!m_Strategy.SelectStrategy(WdmObject()))
+    if (!m_Strategy.SelectStrategy(LowerDeviceObject()))
     {
         TraceEvents(TRACE_LEVEL_INFORMATION, TRACE_FILTERDEVICE, "%!FUNC! Not attached");
         return STATUS_NOT_SUPPORTED;
@@ -525,6 +525,11 @@ NTSTATUS CUsbDkFilterDevice::Create(PWDFDEVICE_INIT DevInit)
         TraceEvents(TRACE_LEVEL_INFORMATION, TRACE_FILTERDEVICE, "%!FUNC! Failed to create device");
         return status;
     }
+    if (!LowerDeviceObject())
+    {
+        TraceEvents(TRACE_LEVEL_INFORMATION, TRACE_FILTERDEVICE, "%!FUNC! No lower device, skip");
+        return STATUS_INVALID_DEVICE_STATE;
+    }
 
     auto deviceContext = UsbDkFilterGetContext(m_Device);
     deviceContext->UsbDkFilter = this;
diff --git a/UsbDk/WdfDevice.cpp b/UsbDk/WdfDevice.cpp
index fe09930..566a078 100644
--- a/UsbDk/WdfDevice.cpp
+++ b/UsbDk/WdfDevice.cpp
@@ -125,6 +125,8 @@ NTSTATUS CWdfDevice::Create(CPreAllocatedDeviceInit &DeviceInit, WDF_OBJECT_ATTR
         TraceEvents(TRACE_LEVEL_ERROR, TRACE_WDFDEVICE, "%!FUNC! Device name caching failed %!STATUS!", status);
     }
 
+    m_LowerDeviceObj = IoGetLowerDeviceObject(WdmObject());
+
     return status;
 }
 
@@ -170,6 +172,10 @@ void CWdfSpecificQueue::InitConfig(WDF_IO_QUEUE_CONFIG &QueueConfig)
 CWdfDevice::~CWdfDevice()
 {
     TraceEvents(TRACE_LEVEL_INFORMATION, TRACE_WDFDEVICE, "%!FUNC! Deleting device %wZ", m_CachedName);
+    if (m_LowerDeviceObj)
+    {
+        ObDereferenceObject(m_LowerDeviceObj);
+    }
 }
 
 NTSTATUS CWdfDevice::CacheDeviceName()
diff --git a/UsbDk/WdfDevice.h b/UsbDk/WdfDevice.h
index a044801..978c3c9 100644
--- a/UsbDk/WdfDevice.h
+++ b/UsbDk/WdfDevice.h
@@ -139,6 +139,7 @@ public:
 
     WDFDEVICE WdfObject() const { return m_Device; }
     PDEVICE_OBJECT WdmObject() const { return WdfDeviceWdmGetDeviceObject(m_Device); };
+    PDEVICE_OBJECT LowerDeviceObject() const { return m_LowerDeviceObj; }
     WDFIOTARGET IOTarget() const
     { return WdfDeviceGetIoTarget(m_Device); }
 
@@ -155,6 +156,7 @@ private:
     NTSTATUS AddQueue(WDF_IO_QUEUE_CONFIG &Config, WDF_OBJECT_ATTRIBUTES &Attributes, WDFQUEUE &Queue);
     NTSTATUS CacheDeviceName();
     CString m_CachedName;
+    PDEVICE_OBJECT m_LowerDeviceObj = nullptr;
 
     friend class CWdfQueue;
 };