diff --git a/dlls/d3d8/device.c b/dlls/d3d8/device.c
index d90161f6cc2..49436da2c45 100644
--- a/dlls/d3d8/device.c
+++ b/dlls/d3d8/device.c
@@ -2344,7 +2344,6 @@ static HRESULT WINAPI d3d8_device_SetIndices(IDirect3DDevice8 *iface,
 {
     struct d3d8_device *device = impl_from_IDirect3DDevice8(iface);
     struct d3d8_indexbuffer *ib = unsafe_impl_from_IDirect3DIndexBuffer8(buffer);
-    HRESULT hr;
 
     TRACE("iface %p, buffer %p, base_vertex_idx %u.\n", iface, buffer, base_vertex_idx);
 
@@ -2356,12 +2355,12 @@ static HRESULT WINAPI d3d8_device_SetIndices(IDirect3DDevice8 *iface,
      */
     wined3d_mutex_lock();
     wined3d_device_set_base_vertex_index(device->wined3d_device, base_vertex_idx);
-    hr = wined3d_device_set_index_buffer(device->wined3d_device,
+    wined3d_device_set_index_buffer(device->wined3d_device,
             ib ? ib->wined3d_buffer : NULL,
             ib ? ib->format : WINED3DFMT_UNKNOWN);
     wined3d_mutex_unlock();
 
-    return hr;
+    return D3D_OK;
 }
 
 static HRESULT WINAPI d3d8_device_GetIndices(IDirect3DDevice8 *iface,
diff --git a/dlls/d3d9/device.c b/dlls/d3d9/device.c
index 8f8f17789c8..523c9ac3db3 100644
--- a/dlls/d3d9/device.c
+++ b/dlls/d3d9/device.c
@@ -2524,17 +2524,16 @@ static HRESULT WINAPI d3d9_device_SetIndices(IDirect3DDevice9Ex *iface, IDirect3
 {
     struct d3d9_device *device = impl_from_IDirect3DDevice9Ex(iface);
     struct d3d9_indexbuffer *ib = unsafe_impl_from_IDirect3DIndexBuffer9(buffer);
-    HRESULT hr;
 
     TRACE("iface %p, buffer %p.\n", iface, buffer);
 
     wined3d_mutex_lock();
-    hr = wined3d_device_set_index_buffer(device->wined3d_device,
+    wined3d_device_set_index_buffer(device->wined3d_device,
             ib ? ib->wined3d_buffer : NULL,
             ib ? ib->format : WINED3DFMT_UNKNOWN);
     wined3d_mutex_unlock();
 
-    return hr;
+    return D3D_OK;
 }
 
 static HRESULT WINAPI d3d9_device_GetIndices(IDirect3DDevice9Ex *iface, IDirect3DIndexBuffer9 **buffer)
diff --git a/dlls/ddraw/device.c b/dlls/ddraw/device.c
index a0526d160ea..24bd9938191 100644
--- a/dlls/ddraw/device.c
+++ b/dlls/ddraw/device.c
@@ -4158,7 +4158,7 @@ static HRESULT d3d_device7_DrawIndexedPrimitiveVB(IDirect3DDevice7 *iface,
 
     /* Set the index stream */
     wined3d_device_set_base_vertex_index(This->wined3d_device, StartVertex);
-    hr = wined3d_device_set_index_buffer(This->wined3d_device, This->indexbuffer, WINED3DFMT_R16_UINT);
+    wined3d_device_set_index_buffer(This->wined3d_device, This->indexbuffer, WINED3DFMT_R16_UINT);
 
     /* Set the vertex stream source */
     hr = wined3d_device_set_stream_source(This->wined3d_device, 0, vb->wineD3DVertexBuffer, 0, stride);
diff --git a/dlls/wined3d/device.c b/dlls/wined3d/device.c
index 386fd25262a..2d6563f3013 100644
--- a/dlls/wined3d/device.c
+++ b/dlls/wined3d/device.c
@@ -2215,7 +2215,7 @@ HRESULT CDECL wined3d_device_get_material(const struct wined3d_device *device, s
     return WINED3D_OK;
 }
 
-HRESULT CDECL wined3d_device_set_index_buffer(struct wined3d_device *device,
+void CDECL wined3d_device_set_index_buffer(struct wined3d_device *device,
         struct wined3d_buffer *buffer, enum wined3d_format_id format_id)
 {
     struct wined3d_buffer *prev_buffer;
@@ -2237,7 +2237,7 @@ HRESULT CDECL wined3d_device_set_index_buffer(struct wined3d_device *device,
             wined3d_buffer_incref(buffer);
         if (prev_buffer)
             wined3d_buffer_decref(prev_buffer);
-        return WINED3D_OK;
+        return;
     }
 
     if (prev_buffer != buffer)
@@ -2254,8 +2254,6 @@ HRESULT CDECL wined3d_device_set_index_buffer(struct wined3d_device *device,
             wined3d_buffer_decref(prev_buffer);
         }
     }
-
-    return WINED3D_OK;
 }
 
 HRESULT CDECL wined3d_device_get_index_buffer(const struct wined3d_device *device, struct wined3d_buffer **buffer)
diff --git a/include/wine/wined3d.h b/include/wine/wined3d.h
index 82a1c803644..28a67198ceb 100644
--- a/include/wine/wined3d.h
+++ b/include/wine/wined3d.h
@@ -2204,7 +2204,7 @@ HRESULT __cdecl wined3d_device_set_depth_stencil(struct wined3d_device *device,
 HRESULT __cdecl wined3d_device_set_dialog_box_mode(struct wined3d_device *device, BOOL enable_dialogs);
 void __cdecl wined3d_device_set_gamma_ramp(const struct wined3d_device *device,
         UINT swapchain_idx, DWORD flags, const struct wined3d_gamma_ramp *ramp);
-HRESULT __cdecl wined3d_device_set_index_buffer(struct wined3d_device *device,
+void __cdecl wined3d_device_set_index_buffer(struct wined3d_device *device,
         struct wined3d_buffer *index_buffer, enum wined3d_format_id format_id);
 HRESULT __cdecl wined3d_device_set_light(struct wined3d_device *device,
         UINT light_idx, const struct wined3d_light *light);