diff --git a/scapy/contrib/pnio_rpc.py b/scapy/contrib/pnio_rpc.py
index e3dd9626d67..8ad90dcd3b6 100644
--- a/scapy/contrib/pnio_rpc.py
+++ b/scapy/contrib/pnio_rpc.py
@@ -1353,8 +1353,9 @@ class PNIORealTimeAcyclicPDUHeader(Packet):
         # IEC-61158-6-10:2021, Table 241
         ShortField("AlarmDstEndpoint", 0),
         ShortField("AlarmSrcEndpoint", 0),
-        BitEnumField("PDUTypeType", 0, 4, PDU_TYPE_TYPE),
+        # PDUType: Version in bits 4-7, Type in bits 0-3
         BitEnumField("PDUTypeVersion", 0, 4, PDU_TYPE_VERSION),
+        BitEnumField("PDUTypeType", 0, 4, PDU_TYPE_TYPE),
         BitField("AddFlags", 0, 8),
         XShortField("SendSeqNum", 0),
         XShortField("AckSeqNum", 0),
diff --git a/test/contrib/pnio_rpc.uts b/test/contrib/pnio_rpc.uts
index 01cbdad9f21..5ebeb354ea6 100644
--- a/test/contrib/pnio_rpc.uts
+++ b/test/contrib/pnio_rpc.uts
@@ -872,6 +872,12 @@ p = Ether(b'\x00\x11\x22\x33\x44\x55' \
 assert p[Alarm_Low].RTA_SDU is None
 assert AlarmNotification_Low not in p
 assert len(p[Padding].load) == 32
+assert p[Alarm_Low].PDUTypeType == 3
+assert p[Alarm_Low].PDUTypeVersion == 1
+
+= PNIO Alarm building writes the PDU type in the low nibble
+p = Alarm_Low(PDUTypeType=2, PDUTypeVersion=1)
+assert raw(p)[4:5] == b'\x12'
 
 = PNIO Alarm building computes VarPartLen
 p = Alarm_High(RTA_SDU=AlarmNotification_High(AlarmType=3))