diff --git a/eid_api.lua b/eid_api.lua
index ac0d692f..32297da9 100644
--- a/eid_api.lua
+++ b/eid_api.lua
@@ -1649,5 +1649,5 @@ end
 
 -- Set a pilleffect to be permanently unidentifyable by EID
 function EID:SetPillEffectUnidentifyable(pillEffectID, isUnidentifyable)
-	EID.UnidentifyablePillEffects[pillEffectID] = isUnidentifyable or nil
+	EID.UnidentifyablePillEffects[pillEffectID + 1] = isUnidentifyable or nil
 end
\ No newline at end of file