diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index 91b00b382d5..9e1bfecb04b 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -1736,6 +1736,8 @@ fs_visitor::compact_virtual_grfs()
       { outputs, ARRAY_SIZE(outputs) },
       { delta_x, ARRAY_SIZE(delta_x) },
       { delta_y, ARRAY_SIZE(delta_y) },
+      { &sample_mask, 1 },
+      { &shader_start_time, 1 },
    };
 
    /* Treat all special values as used, to be conservative */