diff --git a/video/out/vulkan/context.c b/video/out/vulkan/context.c
index d062ea8028..4fcdf11567 100644
--- a/video/out/vulkan/context.c
+++ b/video/out/vulkan/context.c
@@ -583,10 +583,19 @@ static pl_color_space_t target_csp(struct ra_swapchain *sw)
     return (pl_color_space_t){0};
 }
 
+static float target_ref_luma(struct ra_swapchain *sw)
+{
+    struct priv *p = sw->priv;
+    if (p->params.preferred_ref_luma)
+        return p->params.preferred_ref_luma(sw->ctx);
+    return 0;
+}
+
 static const struct ra_swapchain_fns vulkan_swapchain = {
     .color_depth   = color_depth,
     .set_color     = set_color,
     .target_csp    = target_csp,
+    .target_ref_luma = target_ref_luma,
     .start_frame   = start_frame,
     .submit_frame  = submit_frame,
     .swap_buffers  = swap_buffers,
diff --git a/video/out/vulkan/context_win.c b/video/out/vulkan/context_win.c
index 43bdcf2e48..a051243478 100644
--- a/video/out/vulkan/context_win.c
+++ b/video/out/vulkan/context_win.c
@@ -63,6 +63,12 @@ static struct pl_color_space preferred_csp(struct ra_ctx *ctx)
     return (struct pl_color_space){0};
 }
 
+static float preferred_ref_luma(struct ra_ctx *ctx)
+{
+    struct priv *p = ctx->priv;
+    return mp_dxgi_sdr_white_level_from_hwnd(&p->dxgi_ctx, vo_w32_hwnd(ctx->vo));
+}
+
 static bool win_init(struct ra_ctx *ctx)
 {
     struct priv *p = ctx->priv = talloc_zero(ctx, struct priv);
@@ -87,6 +93,7 @@ static bool win_init(struct ra_ctx *ctx)
     struct ra_ctx_params params = {
         .color_depth = color_depth,
         .preferred_csp = preferred_csp,
+        .preferred_ref_luma = preferred_ref_luma,
     };
 
     VkInstance inst = vk->vkinst->instance;