diff --git a/src/data/ability.ts b/src/data/ability.ts
index cde89a0f4ef..40c3d1e5a85 100644
--- a/src/data/ability.ts
+++ b/src/data/ability.ts
@@ -249,7 +249,7 @@ export class PreDefendFormChangeAbAttr extends PreDefendAbAttr {
 }
 export class PreDefendFullHpEndureAbAttr extends PreDefendAbAttr {
   applyPreDefend(pokemon: Pokemon, passive: boolean, attacker: Pokemon, move: PokemonMove, cancelled: Utils.BooleanHolder, args: any[]): boolean {
-    if (pokemon.getHpRatio() < 1 || (args[0] as Utils.NumberHolder).value < pokemon.hp)
+    if (pokemon.getMaxHp() <= 1 && (pokemon.getHpRatio() < 1 || (args[0] as Utils.NumberHolder).value < pokemon.hp))
       return false;
 
     return pokemon.addTag(BattlerTagType.STURDY, 1);