diff --git a/library/GSUP_Types.ttcn b/library/GSUP_Types.ttcn
index 07356f7..0bab1d6 100644
--- a/library/GSUP_Types.ttcn
+++ b/library/GSUP_Types.ttcn
@@ -207,30 +207,30 @@
 		      other, OTHERWISE;)" };
 
 type record  GSUP_PDP_Address_IPv4 {
-	BIT4	pdp_typeorg,
 	BIT4	spare,
+	BIT4	pdp_typeorg,
 	OCT1	pdp_typenum,
 	OCT4	ipv4_address optional
 };
 
 type record GSUP_PDP_Address_IPv6 {
-	BIT4 	pdp_typeorg,
-	BIT4 	spare,
+	BIT4	spare,
+	BIT4	pdp_typeorg,
 	OCT1 	pdp_typenum,
 	OCT16	ipv6_address optional
 };
 
 type record GSUP_PDP_Address_IPv4v6 {
-	BIT4 	pdp_typeorg,
-	BIT4 	spare,
+	BIT4	spare,
+	BIT4	pdp_typeorg,
 	OCT1 	pdp_typenum,
 	OCT4 	ipv4_address optional,
 	OCT16	ipv6_address optional
 };
 
 type record  GSUP_PDP_Address_unknown {
-	BIT4	pdp_typeorg,
 	BIT4	spare,
+	BIT4	pdp_typeorg,
 	OCT1	pdp_typenum,
 	octetstring addr optional
 };