diff --git a/src/intel/compiler/brw/brw_eu_defines.h b/src/intel/compiler/brw/brw_eu_defines.h
index 76a6ff37f35..cb2797e4d23 100644
--- a/src/intel/compiler/brw/brw_eu_defines.h
+++ b/src/intel/compiler/brw/brw_eu_defines.h
@@ -943,7 +943,9 @@ struct tgl_swsb {
    enum tgl_pipe pipe : 3;
    unsigned sbid : 5;
    enum tgl_sbid_mode mode : 3;
-};
+   unsigned pad : 2;
+} PACKED;
+static_assert(sizeof(struct tgl_swsb) == 2, "packed");
 
 /**
  * Construct a scheduling annotation with a single RegDist dependency.  This