diff --git a/amoco/system/fs/ufs.py b/amoco/system/fs/ufs.py
index dd25ef5..1237c35 100644
--- a/amoco/system/fs/ufs.py
+++ b/amoco/system/fs/ufs.py
@@ -145,7 +145,6 @@
 B    : fs_space
 """)
 class superblock(StructFormatter):
-    order = '<'
     def __init__(self,data="",offset=0):
         self.name_formatter('fs_magic')
         self.name_formatter('fs_clean')
@@ -278,7 +277,6 @@ def token_smode_fmt(k,x,cls):
 I    : ic_oeftflag
 """)
 class inode(StructFormatter):
-    order = '<'
     def __init__(self,data="",offset=0):
         self.func_formatter(ic_smode=token_smode_fmt)
         self.flag_formatter('ic_suid')
@@ -304,7 +302,6 @@ def is_reg(self):
 s    : fsd_data
 """)
 class fsd(StructFormatter):
-    order = '<'
     def __init__(self,data="",offset=0):
         if data: self.unpack(data,offset)
 
@@ -324,7 +321,6 @@ def unpack(self,data,offset=0):
 i    : acl_who
 """)
 class acl(StructFormatter):
-    order = '<'
     def __init__(self,data="",offset=0):
         if data: self.unpack(data,offset)
 
@@ -373,7 +369,6 @@ def __init__(self,data="",offset=0):
 extent*1  : extents    ; list of extent structs
 """)
 class extent_block(StructFormatter):
-    order = '<'
     def __init__(self,data="",offset=0):
         if data: self.unpack(data,offset)
 
diff --git a/amoco/system/imx6.py b/amoco/system/imx6.py
index ee2aa3f..32145ee 100644
--- a/amoco/system/imx6.py
+++ b/amoco/system/imx6.py
@@ -88,6 +88,7 @@
 B :  version
 """)
 class HAB_Header(StructFormatter):
+    order = '<'
     def __init__(self,data="",offset=0):
         self.name_formatter('tag')
         self.func_formatter(version=self.token_ver_format)
@@ -128,6 +129,7 @@ def __init__(self,data="",offset=0):
 I          : plugin
 """)
 class BootData(StructFormatter):
+    order = '<'
     def __init__(self,data="",offset=0):
         self.address_formatter('start')
         self.address_formatter('size')
@@ -146,6 +148,7 @@ def __init__(self,data="",offset=0):
 H          :> elen
 """)
 class PublicKey(StructFormatter):
+    order = '<'
     def __init__(self,data="",offset=0):
         self.name_formatter('key_type')
         if data:
@@ -217,7 +220,7 @@ def unpack(self,data,offset=0):
         return self
 
     def size(self):
-        S = struct.calcsize(self.order+self.format())
+        S = struct.calcsize(self.format())
         S += sum((len(c) for c in self.cmds),0)
         return S
 
@@ -247,6 +250,7 @@ def CMD(data,offset):
 I        :  mask
 """)
 class CheckData(StructFormatter):
+    order = '<'
     def __init__(self,data="",offset=0):
         self.name_formatter('cmd')
         self.address_formatter('address')
@@ -265,7 +269,7 @@ def unpack(self,data,offset=0):
         return self
 
     def size(self):
-        S = struct.calcsize(self.order+self.format())
+        S = struct.calcsize(self.format())
         if hasattr(self,'count'): S += 4
         return S
 
@@ -277,6 +281,7 @@ def size(self):
 B        :  und
 """)
 class NOP(StructFormatter):
+    order = '<'
     def __init__(self,data="",offset=0):
         self.name_formatter('cmd')
         if data: self.unpack(data,offset)
@@ -288,6 +293,7 @@ def __init__(self,data="",offset=0):
 B        :  eng
 """)
 class Unlock(StructFormatter):
+    order = '<'
     def __init__(self,data="",offset=0):
         self.name_formatter('cmd')
         if data: self.unpack(data,offset)
@@ -303,7 +309,7 @@ def unpack(self,data,offset=0):
         return self
 
     def size(self):
-        S = struct.calcsize(self.order+self.format())
+        S = struct.calcsize(self.format())
         if hasattr(self,'val'): S += 4*len(self.val)
         return S
 
@@ -321,6 +327,7 @@ def size(self):
 I        :> key_dat
 """)
 class InstallKey(StructFormatter):
+    order = '<'
     def __init__(self,data="",offset=0):
         self.name_formatter('cmd')
         self.flag_formatter('flg')
@@ -341,7 +348,7 @@ def unpack(self,data,offset=0):
         return self
 
     def size(self):
-        S = struct.calcsize(self.order+self.format())
+        S = struct.calcsize(self.format())
         if hasattr(self,'crt_hsh'): S += 4*len(self.crt_hsh)
         return S
 
@@ -357,6 +364,7 @@ def size(self):
 I        :> aut_start
 """)
 class Authenticate(StructFormatter):
+    order = '<'
     def __init__(self,data="",offset=0):
         self.name_formatter('cmd')
         self.flag_formatter('flg')
@@ -391,7 +399,7 @@ def unpack(self,data,offset=0):
         return self
 
     def size(self):
-        S = struct.calcsize(self.order+self.format())
+        S = struct.calcsize(self.format())
         if hasattr(self,'blks'): S += 4*len(self.blks)
         return S
 
diff --git a/amoco/system/structs.py b/amoco/system/structs.py
index 79b1481..af757fd 100644
--- a/amoco/system/structs.py
+++ b/amoco/system/structs.py
@@ -314,9 +314,9 @@ class StructCore(object):
     @classmethod
     def format(cls):
         if cls.union is False:
-            return ''.join((f.format() for f in cls.fields))
+            return cls.order+(''.join((f.format() for f in cls.fields)))
         else:
-            return cls.fields[cls.union].format()
+            return cls.order+cls.fields[cls.union].format()
     @classmethod
     def size(cls):
         return struct.calcsize(cls.format())