diff --git a/pyaccuwage/parser.py b/pyaccuwage/parser.py
index 8eab25d..ab4c0b9 100644
--- a/pyaccuwage/parser.py
+++ b/pyaccuwage/parser.py
@@ -174,7 +174,10 @@ class RecordBuilder(object):
  
 
     def _compile(self, entries):
-        for (f_range, f_name, f_length, f_desc) in entries:
+        for entry in entries:
+            
+            (f_range, f_name, f_length, f_desc) = entry + ['']*(4-len(entry))
+
             f_length = int(f_length)
             try:
                 assert f_length == RangeToken(f_range).value