1 files changed, 11 insertions, 1 deletions
diff --git a/src/bun.js/scripts/class-definitions.ts b/src/bun.js/scripts/class-definitions.ts
index 67e4cf475..f8b08e9bd 100644
--- a/src/bun.js/scripts/class-definitions.ts
+++ b/src/bun.js/scripts/class-definitions.ts
@@ -20,13 +20,23 @@ export interface ClassDefinition {
   proto: Record<string, Field>;
   JSType?: string;
   noConstructor?: boolean;
+  estimatedSize?: boolean;
+  isEventEmitter?: boolean;
 }
 
 export function define(
-  { klass = {}, proto = {}, ...rest } = {} as ClassDefinition
+  {
+    klass = {},
+    proto = {},
+    isEventEmitter = false,
+    estimatedSize = false,
+    ...rest
+  } = {} as ClassDefinition
 ): ClassDefinition {
   return {
     ...rest,
+    isEventEmitter,
+    estimatedSize,
     klass: Object.fromEntries(
       Object.entries(klass).sort(([a], [b]) => a.localeCompare(b))
     ),