diff --git a/reactos/lib/drivers/sound/CMakeLists.txt b/reactos/lib/drivers/sound/CMakeLists.txt
index b5970faa605..36640c190e2 100644
--- a/reactos/lib/drivers/sound/CMakeLists.txt
+++ b/reactos/lib/drivers/sound/CMakeLists.txt
@@ -5,4 +5,5 @@ add_subdirectory(mment4)
 add_subdirectory(mmixer)
 add_subdirectory(shared)
 #add_subdirectory(soundblaster) Nothing links to this lib.
+add_subdirectory(stdunk)
 add_subdirectory(uartmidi)
diff --git a/reactos/lib/drivers/sound/stdunk/CMakeLists.txt b/reactos/lib/drivers/sound/stdunk/CMakeLists.txt
new file mode 100644
index 00000000000..0e2c29d49f2
--- /dev/null
+++ b/reactos/lib/drivers/sound/stdunk/CMakeLists.txt
@@ -0,0 +1,10 @@
+
+set_cpp()
+
+add_library(stdunk STATIC cunknown.cpp)
+
+if(MSVC)
+    add_target_compile_flags(stdunk "/GR-")
+else()
+    add_target_compile_flags(stdunk "-fno-exceptions -fno-rtti")
+endif()
diff --git a/reactos/lib/drivers/sound/stdunk/cunknown.cpp b/reactos/lib/drivers/sound/stdunk/cunknown.cpp
new file mode 100644
index 00000000000..d97e6405481
--- /dev/null
+++ b/reactos/lib/drivers/sound/stdunk/cunknown.cpp
@@ -0,0 +1,72 @@
+/*
+    ReactOS Kernel-Mode COM
+    IUnknown implementations
+
+    LICENSE
+        Please see COPYING in the top-level directory for license information.
+
+    AUTHORS
+        Andrew Greenwood
+*/
+
+#include <stdunk.h>
+
+CUnknown::CUnknown(PUNKNOWN outer_unknown)
+{
+    m_ref_count = 0;
+
+    if ( outer_unknown )
+        m_outer_unknown = outer_unknown;
+    else
+        m_outer_unknown = PUNKNOWN(dynamic_cast<PNONDELEGATINGUNKNOWN>(this));
+}
+
+CUnknown::~CUnknown()
+{
+}
+
+STDMETHODIMP_(ULONG)
+CUnknown::NonDelegatingAddRef()
+{
+    InterlockedIncrement(&m_ref_count);
+    return m_ref_count;
+}
+
+STDMETHODIMP_(ULONG)
+CUnknown::NonDelegatingRelease()
+{
+    if ( InterlockedDecrement(&m_ref_count) == 0 )
+    {
+        m_ref_count ++;
+        delete this;
+        return 0;
+    }
+
+    return m_ref_count;
+}
+
+STDMETHODIMP_(NTSTATUS)
+CUnknown::NonDelegatingQueryInterface(
+    IN  REFIID iid,
+    PVOID* ppVoid)
+{
+    /* FIXME */
+    #if 0
+    if ( IsEqualGUID(iid, IID_IUnknown) )   /* TODO: Aligned? */
+        *ppVoid = PVOID(PUNKNOWN(this));
+    else
+        *ppVoid = NULL;
+    #endif
+
+    if ( *ppVoid )
+    {
+        PUNKNOWN(*ppVoid)->AddRef();
+        return STATUS_SUCCESS;
+    }
+
+    return STATUS_INVALID_PARAMETER;
+}
+
+#if __GNUC__
+extern "C" void __cxa_pure_virtual() { ASSERT(FALSE); }
+#endif