diff --git a/packages/bun-types/globals.d.ts b/packages/bun-types/globals.d.ts
index 4dd3dea89e07..8719feefd12e 100644
--- a/packages/bun-types/globals.d.ts
+++ b/packages/bun-types/globals.d.ts
@@ -1060,7 +1060,7 @@ interface ArrayBuffer {
   /**
    * Resize an ArrayBuffer in-place.
    */
-  resize(byteLength: number): ArrayBuffer;
+  resize(byteLength: number): void;
 
   /**
    * Returns a section of an ArrayBuffer.
diff --git a/test/integration/bun-types/fixture/array-buffer.ts b/test/integration/bun-types/fixture/array-buffer.ts
index 7dcf9c4db30e..eab0c2b17b36 100644
--- a/test/integration/bun-types/fixture/array-buffer.ts
+++ b/test/integration/bun-types/fixture/array-buffer.ts
@@ -7,6 +7,11 @@ const buffer = new ArrayBuffer(1024, {
 console.log(buffer.byteLength); // 1024
 buffer.resize(2048);
 console.log(buffer.byteLength); // 2048
+
+// resize() mutates the buffer in place and returns undefined (void) per the
+// ECMAScript spec, not the ArrayBuffer.
+const resizeResult: void = buffer.resize(1024);
+void resizeResult;
 TextDecoder;
 
 const buf = new SharedArrayBuffer(1024);