diff --git a/src/browser/webapi/streams/ReadableStream.zig b/src/browser/webapi/streams/ReadableStream.zig
index 98e326f5..f8edb594 100644
--- a/src/browser/webapi/streams/ReadableStream.zig
+++ b/src/browser/webapi/streams/ReadableStream.zig
@@ -80,7 +80,7 @@ pub fn init(src_: ?UnderlyingSource, strategy_: ?QueueingStrategy, page: *Page)
 
         if (src.cancel) |callback| {
             self._cancel = .{
-                .callback = callback,
+                .callback = try callback.persist(),
             };
         }