diff --git a/debian/login.defs b/debian/login.defs
index 6c02b6fc..2e43d04e 100644
--- a/debian/login.defs
+++ b/debian/login.defs
@@ -169,6 +169,10 @@ UID_MAX			60000
 # System accounts
 #SYS_UID_MIN		  100
 #SYS_UID_MAX		  999
+# Extra per user uids
+SUB_UID_MIN		   100000
+SUB_UID_MAX		600100000
+SUB_UID_COUNT		    65536
 
 #
 # Min/max values for automatic gid selection in groupadd
@@ -178,6 +182,10 @@ GID_MAX			60000
 # System accounts
 #SYS_GID_MIN		  100
 #SYS_GID_MAX		  999
+# Extra per user group ids
+SUB_GID_MIN		   100000
+SUB_GID_MAX		600100000
+SUB_GID_COUNT		    65536
 
 #
 # Max number of login retries if password is bad. This will most likely be