diff --git a/src/data/pokemon-forms.ts b/src/data/pokemon-forms.ts
index b3c122d3b38..20703cebe81 100644
--- a/src/data/pokemon-forms.ts
+++ b/src/data/pokemon-forms.ts
@@ -365,7 +365,7 @@ export class SpeciesDefaultFormMatchTrigger extends SpeciesFormChangeTrigger {
  */
 export class SpeciesFormChangeTeraTrigger extends SpeciesFormChangeTrigger {
   /** The Tera type that triggers the form change */
-  public teraType: Type;
+  private teraType: Type;
 
   constructor(teraType: Type) {
     super();