diff --git a/Data/expansions/tbc/dbc_layouts.json b/Data/expansions/tbc/dbc_layouts.json
index a2a3ffa7..e2cb9908 100644
--- a/Data/expansions/tbc/dbc_layouts.json
+++ b/Data/expansions/tbc/dbc_layouts.json
@@ -210,7 +210,7 @@
     "AttributesEx": 6,
     "CastingTimeIndex": 22,
     "DispelType": 3,
-    "DurationIndex": 40,
+    "DurationIndex": 34,
     "EffectBasePoints0": 80,
     "EffectBasePoints1": 81,
     "EffectBasePoints2": 82,