diff --git a/omg.sty b/omg.sty
index 31d24b7..29e03f5 100644
--- a/omg.sty
+++ b/omg.sty
@@ -7,6 +7,8 @@
 %%   version 1 of the License, or any later version.
 %%   OR
 %%   The 2-clause BSD-style license.
+%%
+%%   SPDX-License-Identifier: LPPL-1.0+ OR BSD-2-Clause
 \NeedsTeXFormat{LaTeX2e}
 \ProvidesPackage{omg}
    [2014/11/10 OMG Layout.]
diff --git a/omgrpt.cls b/omgrpt.cls
index 658161a..a365c25 100644
--- a/omgrpt.cls
+++ b/omgrpt.cls
@@ -7,6 +7,8 @@
 %%   version 1 of the License, or any later version.
 %%   OR
 %%   The 2-clause BSD-style license.
+%%
+%%   SPDX-License-Identifier: LPPL-1.0+ OR BSD-2-Clause
 \NeedsTeXFormat{LaTeX2e}\relax
 \ProvidesClass{omgrpt}[2014/10/11]
 \LoadClass{scrreprt}