diff --git a/dlls/wined3d/device.c b/dlls/wined3d/device.c
index ef73487fe99..8593a6a9695 100644
--- a/dlls/wined3d/device.c
+++ b/dlls/wined3d/device.c
@@ -1684,7 +1684,7 @@ HRESULT CDECL wined3d_device_set_display_mode(struct wined3d_device *device,
     return WINED3D_OK;
 }
 
-HRESULT CDECL wined3d_device_get_wined3d(struct wined3d_device *device, struct wined3d **wined3d)
+HRESULT CDECL wined3d_device_get_wined3d(const struct wined3d_device *device, struct wined3d **wined3d)
 {
     TRACE("device %p, wined3d %p.\n", device, wined3d);
 
diff --git a/include/wine/wined3d.h b/include/wine/wined3d.h
index b2d46633ae5..3a1cb87b7df 100644
--- a/include/wine/wined3d.h
+++ b/include/wine/wined3d.h
@@ -2271,7 +2271,7 @@ HRESULT __cdecl wined3d_device_get_vs_consts_f(struct wined3d_device *device,
         UINT start_register, float *constants, UINT vector4f_count);
 HRESULT __cdecl wined3d_device_get_vs_consts_i(struct wined3d_device *device,
         UINT start_register, int *constants, UINT vector4i_count);
-HRESULT __cdecl wined3d_device_get_wined3d(struct wined3d_device *device, struct wined3d **d3d);
+HRESULT __cdecl wined3d_device_get_wined3d(const struct wined3d_device *device, struct wined3d **wined3d);
 ULONG __cdecl wined3d_device_incref(struct wined3d_device *device);
 HRESULT __cdecl wined3d_device_init_3d(struct wined3d_device *device, WINED3DPRESENT_PARAMETERS *present_parameters);
 HRESULT __cdecl wined3d_device_init_gdi(struct wined3d_device *device, WINED3DPRESENT_PARAMETERS *present_parameters);