diff --git a/src/interfaces/calc/CalcdexPokemon.ts b/src/interfaces/calc/CalcdexPokemon.ts
index 57b1c4b5..217a13d1 100644
--- a/src/interfaces/calc/CalcdexPokemon.ts
+++ b/src/interfaces/calc/CalcdexPokemon.ts
@@ -859,6 +859,13 @@ export interface CalcdexPokemon extends CalcdexLeanPokemon {
    */
   criticalHit?: boolean;
 
+  /**
+   * Volatile status conditions Pokemon has.
+   *
+   * * Currently only useful for Tar Shot damage calculation, but could be useful for other moves like it in the future, too.
+   */
+  volatileStatus?: Showdown.PokemonVolatile;
+
   /**
    * User-modified non-volatile status condition.
    *
diff --git a/src/utils/calc/calcMoveBasePower.ts b/src/utils/calc/calcMoveBasePower.ts
index 0c784f3c..6a08d68e 100644
--- a/src/utils/calc/calcMoveBasePower.ts
+++ b/src/utils/calc/calcMoveBasePower.ts
@@ -242,6 +242,10 @@ export const calcMoveBasePower = (
     basePowerMods.push(2);
   }
 
+  if ('tarshot' in opponentPokemon?.volatiles && moveType === 'Fire') {
+    basePowerMods.push(2);
+  }
+
   if (basePowerMods.length) {
     basePower = basePowerMods.reduce((bp, mod) => Math.floor(bp * clamp(0, mod)), basePower);
   }