diff --git a/src/mesa/drivers/dri/i965/brw_wm_state.c b/src/mesa/drivers/dri/i965/brw_wm_state.c
index 3c3b3473d63..1844eba80e5 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_state.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_state.c
@@ -109,7 +109,7 @@ wm_unit_populate_key(struct brw_context *brw, struct brw_wm_unit_key *key)
    key->uses_kill = fp->UsesKill || ctx->Color.AlphaEnabled;
    key->is_glsl = brw_wm_is_glsl(fp);
 
-   /* XXX: This needs a flag to indicate when it changes. */
+   /* _NEW_DEPTH */
    key->stats_wm = intel->stats_wm;
 
    /* _NEW_LINE */
@@ -278,7 +278,8 @@ const struct brw_tracked_state brw_wm_unit = {
       .mesa = (_NEW_POLYGON | 
 	       _NEW_POLYGONSTIPPLE | 
 	       _NEW_LINE | 
-	       _NEW_COLOR),
+	       _NEW_COLOR |
+	       _NEW_DEPTH),
 
       .brw = (BRW_NEW_FRAGMENT_PROGRAM | 
 	      BRW_NEW_CURBE_OFFSETS |