diff --git a/tardis/energy_input/GXPacket.py b/tardis/energy_input/GXPacket.py
index ba8ab609b5a..5ecf7095d45 100644
--- a/tardis/energy_input/GXPacket.py
+++ b/tardis/energy_input/GXPacket.py
@@ -32,7 +32,7 @@ class GXPacketStatus(IntEnum):
     ("status", int64),
     ("shell", int64),
     ("time_current", float64),
-    ("tau", float64),
+    ("tau_event", float64),
 ]