diff --git a/src/battle_util.c b/src/battle_util.c
index 763a910ac..b1534a3ec 100644
--- a/src/battle_util.c
+++ b/src/battle_util.c
@@ -9333,8 +9333,13 @@ bool32 CanMegaEvolve(u8 battlerId)
     {
         if (B_ENABLE_DEBUG && gBattleStruct->debugHoldEffects[battlerId])
             holdEffect = gBattleStruct->debugHoldEffects[battlerId];
+#ifdef ITEM_EXPANSION
+        else if (itemId == ITEM_ENIGMA_BERRY_E_READER)
+            holdEffect = gEnigmaBerries[battlerId].holdEffect;
+#else
         else if (itemId == ITEM_ENIGMA_BERRY)
             holdEffect = gEnigmaBerries[battlerId].holdEffect;
+#endif
         else
             holdEffect = ItemId_GetHoldEffect(itemId);