diff --git a/src/data/moves/move.ts b/src/data/moves/move.ts
index ca6860fc3ea..2394448871c 100644
--- a/src/data/moves/move.ts
+++ b/src/data/moves/move.ts
@@ -5966,7 +5966,7 @@ export class HitsTagAttr extends MoveAttr {
   /** The {@linkcode BattlerTagType} this move hits */
   public tagType: BattlerTagType;
   /** Should this move deal double damage against {@linkcode tagType}? */
-  public doubleDamage: boolean;
+  public doubleDamage = false;
 
   constructor(tagType: BattlerTagType) {
     super();