diff --git a/dlls/d3d10core/shader.c b/dlls/d3d10core/shader.c
index d1d67bd08f6..ee470016774 100644
--- a/dlls/d3d10core/shader.c
+++ b/dlls/d3d10core/shader.c
@@ -388,9 +388,11 @@ static HRESULT STDMETHODCALLTYPE d3d10_geometry_shader_SetPrivateData(ID3D10Geom
 static HRESULT STDMETHODCALLTYPE d3d10_geometry_shader_SetPrivateDataInterface(ID3D10GeometryShader *iface,
         REFGUID guid, const IUnknown *data)
 {
-    FIXME("iface %p, guid %s, data %p stub!\n", iface, debugstr_guid(guid), data);
+    struct d3d10_geometry_shader *shader = impl_from_ID3D10GeometryShader(iface);
 
-    return E_NOTIMPL;
+    TRACE("iface %p, guid %s, data %p.\n", iface, debugstr_guid(guid), data);
+
+    return d3d10_set_private_data_interface(&shader->private_store, guid, data);
 }
 
 static const struct ID3D10GeometryShaderVtbl d3d10_geometry_shader_vtbl =