diff --git a/dlls/d3d10core/buffer.c b/dlls/d3d10core/buffer.c
index c5d851e3f48..ff94fbcc923 100644
--- a/dlls/d3d10core/buffer.c
+++ b/dlls/d3d10core/buffer.c
@@ -111,10 +111,12 @@ static HRESULT STDMETHODCALLTYPE d3d10_buffer_GetPrivateData(ID3D10Buffer *iface
 static HRESULT STDMETHODCALLTYPE d3d10_buffer_SetPrivateData(ID3D10Buffer *iface,
         REFGUID guid, UINT data_size, const void *data)
 {
-    FIXME("iface %p, guid %s, data_size %u, data %p stub!\n",
+    struct d3d10_buffer *buffer = impl_from_ID3D10Buffer(iface);
+
+    TRACE("iface %p, guid %s, data_size %u, data %p.\n",
             iface, debugstr_guid(guid), data_size, data);
 
-    return E_NOTIMPL;
+    return d3d10_set_private_data(&buffer->private_store, guid, data_size, data);
 }
 
 static HRESULT STDMETHODCALLTYPE d3d10_buffer_SetPrivateDataInterface(ID3D10Buffer *iface,
@@ -206,6 +208,9 @@ struct d3d10_buffer *unsafe_impl_from_ID3D10Buffer(ID3D10Buffer *iface)
 
 static void STDMETHODCALLTYPE d3d10_buffer_wined3d_object_released(void *parent)
 {
+    struct d3d10_buffer *buffer = parent;
+
+    wined3d_private_store_cleanup(&buffer->private_store);
     HeapFree(GetProcessHeap(), 0, parent);
 }
 
@@ -222,6 +227,7 @@ HRESULT d3d10_buffer_init(struct d3d10_buffer *buffer, struct d3d10_device *devi
 
     buffer->ID3D10Buffer_iface.lpVtbl = &d3d10_buffer_vtbl;
     buffer->refcount = 1;
+    wined3d_private_store_init(&buffer->private_store);
 
     FIXME("Implement DXGI<->wined3d usage conversion\n");
 
@@ -237,6 +243,7 @@ HRESULT d3d10_buffer_init(struct d3d10_buffer *buffer, struct d3d10_device *devi
     if (FAILED(hr))
     {
         WARN("Failed to create wined3d buffer, hr %#x.\n", hr);
+        wined3d_private_store_cleanup(&buffer->private_store);
         return hr;
     }
 
diff --git a/dlls/d3d10core/d3d10core_private.h b/dlls/d3d10core/d3d10core_private.h
index 18c5ca181b9..5544dc775e0 100644
--- a/dlls/d3d10core/d3d10core_private.h
+++ b/dlls/d3d10core/d3d10core_private.h
@@ -121,6 +121,7 @@ struct d3d10_buffer
     ID3D10Buffer ID3D10Buffer_iface;
     LONG refcount;
 
+    struct wined3d_private_store private_store;
     struct wined3d_buffer *wined3d_buffer;
     ID3D10Device1 *device;
 };