diff --git a/METADATA b/METADATA
index 6d8601b..20b25ba 100644
--- a/METADATA
+++ b/METADATA
@@ -1,3 +1,8 @@
+# *** THIS PACKAGE HAS SPECIAL LICENSING CONDITIONS.  PLEASE
+#     CONSULT THE OWNERS AND opensource-licensing@google.com BEFORE
+#     DEPENDING ON IT IN YOUR PROJECT. ***
 third_party {
-  license_type: RESTRICTED
+  # would be RESTRICTED save for invensense license:
+  #   6515/libsensors_iio/License.txt
+  license_type: BY_EXCEPTION_ONLY
 }