diff --git a/aprslib/parsing/__init__.py b/aprslib/parsing/__init__.py
index c2eae9a..56e0714 100644
--- a/aprslib/parsing/__init__.py
+++ b/aprslib/parsing/__init__.py
@@ -158,11 +158,8 @@ def parse(packet):
 def _try_toparse_body(packet_type, body, parsed):
     result = {}
 
-    if packet_type in unsupported_formats:
-        raise UnknownFormat('format is not supported: {0}'.format(unsupported_formats[packet_type]))
-
     # user defined
-    elif packet_type == ',':
+    if packet_type == ',':
         logger.debug("Packet is invalid format")
 
         body, result = parse_invalid(body)
@@ -203,6 +200,11 @@ def _try_toparse_body(packet_type, body, parsed):
 
         body, result = parse_position(packet_type, body)
 
+    # other data types
+    elif packet_type in unsupported_formats:
+        raise UnknownFormat('format is not supported: {0}'.format(unsupported_formats[packet_type]))
+
+
     # we are done
     parsed.update(result)