diff --git a/stdlib/2.7/stat.pyi b/stdlib/2.7/stat.pyi
index b158ff7c6..dd3418db9 100644
--- a/stdlib/2.7/stat.pyi
+++ b/stdlib/2.7/stat.pyi
@@ -33,6 +33,7 @@ S_IRWXU = 0
 S_IRUSR = 0
 S_IWUSR = 0
 S_IXUSR = 0
+S_IRWXG = 0
 S_IRGRP = 0
 S_IWGRP = 0
 S_IXGRP = 0