diff --git a/src/gallium/auxiliary/nir/tgsi_to_nir.c b/src/gallium/auxiliary/nir/tgsi_to_nir.c
index 0b96a3e707d..ff42c4536bb 100644
--- a/src/gallium/auxiliary/nir/tgsi_to_nir.c
+++ b/src/gallium/auxiliary/nir/tgsi_to_nir.c
@@ -646,6 +646,10 @@ ttn_src_for_file_and_index(struct ttn_compile *c, unsigned file, unsigned index,
          op = nir_intrinsic_load_work_group_id;
          load = nir_load_work_group_id(b);
          break;
+      case TGSI_SEMANTIC_BLOCK_SIZE:
+         op = nir_intrinsic_load_local_group_size;
+         load = nir_load_local_group_size(b);
+         break;
       case TGSI_SEMANTIC_CS_USER_DATA_AMD:
          op = nir_intrinsic_load_user_data_amd;
          load = nir_load_user_data_amd(b);