diff --git a/src/vulkan/anv_pipeline.c b/src/vulkan/anv_pipeline.c
index c6d2395cdc4..59f304f55df 100644
--- a/src/vulkan/anv_pipeline.c
+++ b/src/vulkan/anv_pipeline.c
@@ -305,6 +305,8 @@ populate_wm_prog_key(const struct brw_device_info *devinfo,
 
    populate_sampler_prog_key(devinfo, &key->tex);
 
+   /* TODO: Fill out key->input_slots_valid */
+
    /* Vulkan doesn't specify a default */
    key->high_quality_derivatives = false;