diff --git a/python/m5/objects/Ethernet.py b/python/m5/objects/Ethernet.py
index c2f818325..3ad6b57f9 100644
--- a/python/m5/objects/Ethernet.py
+++ b/python/m5/objects/Ethernet.py
@@ -12,6 +12,7 @@ class EtherLink(SimObject):
     int1 = Param.EtherInt("interface 1")
     int2 = Param.EtherInt("interface 2")
     delay = Param.Latency('0us', "packet transmit delay")
+    delay_var = Param.Latency('0ns', "packet transmit delay variability")
     speed = Param.NetworkBandwidth('1Gbps', "link speed")
     dump = Param.EtherDump(NULL, "dump object")