diff --git a/metadata/fields/custom/license_allowlist.py b/metadata/fields/custom/license_allowlist.py
index 82f12af54..ac10e9f33 100644
--- a/metadata/fields/custom/license_allowlist.py
+++ b/metadata/fields/custom/license_allowlist.py
@@ -33,6 +33,7 @@ ALLOWED_SPDX_LICENSES = frozenset([
     # Public Domain variants.
     "ISC",
     "ICU",
+    "LZMA-SDK-9.22",
     "SunPro",
     "BSL-1.0",
 ])