diff --git a/src/data/ability.ts b/src/data/ability.ts
index e31672aa35c..e87784b2488 100644
--- a/src/data/ability.ts
+++ b/src/data/ability.ts
@@ -988,6 +988,12 @@ export class MoveTypeChangeAttr extends PreAttackAbAttr {
   }
 }
 
+/**
+ * Class for abilities that boost the damage of moves
+ * For abilities that boost the base power of moves, see VariableMovePowerAbAttr
+ * @param damageMultiplier the amount to multiply the damage by 
+ * @param condition the condition for this ability to be applied 
+ */
 export class DamageBoostAbAttr extends PreAttackAbAttr {
   private damageMultiplier: number;
   private condition: PokemonAttackCondition;
@@ -998,9 +1004,18 @@ export class DamageBoostAbAttr extends PreAttackAbAttr {
     this.condition = condition;
   }
 
-    applyPreAttack(pokemon: Pokemon, passive: boolean, target: Pokemon, move: PokemonMove, args: any[]): boolean {
-      if (this.condition(pokemon, target, move.getMove())) {
-        (args[0] as Utils.NumberHolder).value *= this.damageMultiplier;
+  /**
+   * 
+   * @param pokemon the attacker pokemon
+   * @param passive N/A
+   * @param defender the target pokemon
+   * @param move the move used by the attacker pokemon
+   * @param args Utils.NumberHolder as damage
+   * @returns true if the function succeeds
+   */
+  applyPreAttack(pokemon: Pokemon, passive: boolean, defender: Pokemon, move: PokemonMove, args: any[]): boolean {
+    if (this.condition(pokemon, defender, move.getMove())) {
+      (args[0] as Utils.NumberHolder).value *= this.damageMultiplier;
         return true;
       }