diff --git a/src/data/ability.ts b/src/data/ability.ts
index e2cc4c56da7..cad6257152d 100644
--- a/src/data/ability.ts
+++ b/src/data/ability.ts
@@ -249,8 +249,10 @@ 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.hp === pokemon.getMaxHp() && pokemon.getMaxHp() >= 1 && (args[0] as Utils.NumberHolder).value >= pokemon.hp){ //Checks if pokemon hp is full and if the damage is higher or equal to defender hp
-      return pokemon.addTag(BattlerTagType.STURDY, 1); //activates sturdy
+    if (pokemon.hp === pokemon.getMaxHp() &&
+        pokemon.getMaxHp() > 1 && //Checks if pokemon has wonder_guard (which forces 1hp)
+        (args[0] as Utils.NumberHolder).value >= pokemon.hp){ //Damage >= hp
+      return pokemon.addTag(BattlerTagType.STURDY, 1);
     }
     
     return false