diff --git a/src/battle_util.c b/src/battle_util.c
index ab61e63abb..c083df2985 100644
--- a/src/battle_util.c
+++ b/src/battle_util.c
@@ -6205,7 +6205,7 @@ u32 IsAbilityPreventingEscape(u32 battler)
     if (B_GHOSTS_ESCAPE >= GEN_6 && IS_BATTLER_OF_TYPE(battler, TYPE_GHOST))
         return 0;
     if ((id = IsAbilityOnOpposingSide(battler, ABILITY_SHADOW_TAG))
-        && (B_SHADOW_TAG_ESCAPE < GEN_4 && GetBattlerAbility(battler) != ABILITY_SHADOW_TAG))
+        && (B_SHADOW_TAG_ESCAPE >= GEN_4 && GetBattlerAbility(battler) != ABILITY_SHADOW_TAG))
         return id;
     if ((id = IsAbilityOnOpposingSide(battler, ABILITY_ARENA_TRAP)) && IsBattlerGrounded(battler))
         return id;