diff --git a/src/data/battle_moves.h b/src/data/battle_moves.h
index ef6ad52a1c..ebd64ae10b 100644
--- a/src/data/battle_moves.h
+++ b/src/data/battle_moves.h
@@ -9895,7 +9895,7 @@ const struct BattleMove gBattleMoves[MOVES_COUNT_Z] =
 
     [MOVE_DIAMOND_STORM] =
     {
-        #if B_UPDATED_MOVE_DATA >= GEN_4
+        #if B_UPDATED_MOVE_DATA >= GEN_7
             .effect = EFFECT_DEFENSE_UP2_HIT,
         #else
             .effect = EFFECT_DEFENSE_UP_HIT,