diff --git a/source/langtags.csv b/source/langtags.csv
index bfd7ec2..3b0e192 100644
--- a/source/langtags.csv
+++ b/source/langtags.csv
@@ -8212,6 +8212,7 @@ ums,ums-Latn-ID,Pendau,ID,,,01512,,,,,SEA,ums,,20-Apr-2018,
 umu,umu-Latn-CA,Munsee,CA US,,,,del,,,,NAM,umu,LE,9-Jan-2018,
 una,una-Latn-PG,"Watut, North",PG,,,,,1,,,MEL,una,LE,10-Jan-2018,
 und,und-Zyyy-001,Undetermined,001,,,,,,,,001,und,,,Special
+und,und-Cpmn-001,Undetermined,001,,,,,,,,001,und,,,
 une,une-Latn-NG,Uneme,NG,,,,,1,,,WAF,une,,,
 ung,ung-Latn-AU,Ngarinyin,AU,,,,,1,,,ANZ,ung,LE,10-Jan-2018,
 uni,uni-Latn-PG,Uni,PG,,,,,,,,MEL,uni,,,