diff --git a/bin/fwr.py b/bin/fwr.py
index f6324c9..fe75d50 100644
--- a/bin/fwr.py
+++ b/bin/fwr.py
@@ -35,7 +35,7 @@ def parse_line (line, fields, fixed = None):
 
 	for key in fields:
 		spec = fields[key]
-		transformer = transform[spec["type"]]
+		transformer = transform[spec.get("type", "str")]
 		pos_from = spec["offset"]
 		pos_to = pos_from + spec["length"]
 		text = line[pos_from:pos_to]