diff --git a/utils/drc-mag-sky130A.sh b/utils/drc-mag-sky130A.sh
index 9fedad3..1acba4c 100644
--- a/utils/drc-mag-sky130A.sh
+++ b/utils/drc-mag-sky130A.sh
@@ -12,6 +12,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+# SPDX-License-Identifier: Apache-2.0
 
 # To call: ./drc-mag-sky130A.sh <target_path> <design_name> <pdk-root> [<output_path> default is <target_path>/results/]