diff --git a/pw_sys_io_baremetal_stm32f429/BUILD.gn b/pw_sys_io_baremetal_stm32f429/BUILD.gn
index f2f4bcc..f1d9466 100644
--- a/pw_sys_io_baremetal_stm32f429/BUILD.gn
+++ b/pw_sys_io_baremetal_stm32f429/BUILD.gn
@@ -12,6 +12,10 @@
 # License for the specific language governing permissions and limitations under
 # the License.
 
+# gn-format disable
+import("//build_overrides/pigweed.gni")
+
+import("$dir_pigweed/legacy_target.gni")
 import("$dir_pw_build/target_types.gni")
 import("$dir_pw_docgen/docs.gni")