diff --git a/dbus-pcap/dbus-pcap b/dbus-pcap/dbus-pcap
index 3c797e0..eea8ba4 100755
--- a/dbus-pcap/dbus-pcap
+++ b/dbus-pcap/dbus-pcap
@@ -123,6 +123,7 @@
     DBusType.STRUCT.value : TypeProperty(DBusType.STRUCT, None, 8),
     DBusType.VARIANT.value : TypeProperty(DBusType.VARIANT, None, 1),
     DBusType.DICT_ENTRY.value : TypeProperty(DBusType.DICT_ENTRY, None, 8),
+    DBusType.UNIX_FD.value : TypeProperty(DBusType.UINT32, None, 8),
 }
 
 def parse_signature(sigstream):
@@ -163,6 +164,8 @@
         prop = TypePropertyLookup[tc.type.value]
         if prop.field.value in DBusTypeCategory.STRING.value:
             prop = TypePropertyLookup[prop.nature.value]
+        if prop.nature == DBusType.UINT32:
+            prop = TypePropertyLookup[prop.nature.value]
         advance = (prop.nature - (self.offset & (prop.nature - 1))) % prop.nature
         _ = bytes(islice(self.stream, advance))
         self.offset += advance