diff --git a/include/9on12Adapter.h b/include/9on12Adapter.h
index 02dea7a..ab1d7a7 100644
--- a/include/9on12Adapter.h
+++ b/include/9on12Adapter.h
@@ -50,5 +50,6 @@ namespace D3D9on12
         const D3D9ON12_PRIVATE_CALLBACKS m_privateCallbacks;
 
         const bool m_bSupportsNewPresent;
+        const bool m_bSupportsShaderSigning;
     };
 };
diff --git a/interface/d3d9on12ddi.h b/interface/d3d9on12ddi.h
index 5ec50cb..3b4f904 100644
--- a/interface/d3d9on12ddi.h
+++ b/interface/d3d9on12ddi.h
@@ -40,10 +40,12 @@ typedef struct _D3D9ON12_PRESENTCB_ARGS
 
 
 typedef HRESULT(CALLBACK* PFND3D9ON12_PRESENTCB)(_In_ HANDLE, _In_ D3D9ON12_PRESENTCB_ARGS*);
+typedef HRESULT(CALLBACK* PFND3D9ON12_SIGNDXBCCB)(_Inout_ BYTE* pData, _In_ UINT32 byteCount);
 
 typedef struct _D3D9ON12_PRIVATE_CALLBACKS
 {
     PFND3D9ON12_PRESENTCB pfnPresentCB;
+    PFND3D9ON12_SIGNDXBCCB pfnSignDxbcCB;
 } D3D9ON12_PRIVATE_CALLBACKS;
 
 typedef struct _D3D9ON12_CREATE_DEVICE_ARGS2
diff --git a/src/9on12Adapter.cpp b/src/9on12Adapter.cpp
index 578d693..2ddcad6 100644
--- a/src/9on12Adapter.cpp
+++ b/src/9on12Adapter.cpp
@@ -207,7 +207,8 @@ namespace D3D9on12
         m_AdapterCallbacks( *OpenAdapter.pAdapterCallbacks ),
         m_pDevice(nullptr),
         m_privateCallbacks(pArgs->D3D9On12InterfaceVersion >= 2 ? *pArgs->pPrivateCallbacks : D3D9ON12_PRIVATE_CALLBACKS()),
-        m_bSupportsNewPresent(pArgs->D3D9On12InterfaceVersion >= 2 ? m_privateCallbacks.pfnPresentCB != nullptr : false)
+        m_bSupportsNewPresent(pArgs->D3D9On12InterfaceVersion >= 2 ? m_privateCallbacks.pfnPresentCB != nullptr : false),
+        m_bSupportsShaderSigning(pArgs->D3D9On12InterfaceVersion >= 2 ? m_privateCallbacks.pfnSignDxbcCB != nullptr : false)
     {
         if (RegistryConstants::g_cBreakOnLoad)
         {