diff --git a/src/intel/compiler/brw_nir.c b/src/intel/compiler/brw_nir.c
index e1a39a9ca9e..3ff83240a4c 100644
--- a/src/intel/compiler/brw_nir.c
+++ b/src/intel/compiler/brw_nir.c
@@ -1480,6 +1480,7 @@ brw_preprocess_nir(const struct brw_compiler *compiler, nir_shader *nir,
    OPT(nir_lower_compute_system_values, &lower_csv_options);
 
    const nir_lower_subgroups_options subgroups_options = {
+      .subgroup_size = brw_nir_api_subgroup_size(nir, 0),
       .ballot_bit_size = 32,
       .ballot_components = 1,
       .lower_to_scalar = true,