diff --git a/src/async/posix_event_loop.zig b/src/async/posix_event_loop.zig
index 6ab59c66f7..7ee6c5d31d 100644
--- a/src/async/posix_event_loop.zig
+++ b/src/async/posix_event_loop.zig
@@ -592,8 +592,10 @@ pub const FilePoll = struct {
 
             poll.flags.insert(.ignore_updates);
             this.pending_free_tail = poll;
-            bun.assert(vm.after_event_loop_callback == null or vm.after_event_loop_callback == @as(?JSC.OpaqueCallback, @ptrCast(&processDeferredFrees)));
-            vm.after_event_loop_callback = @ptrCast(&processDeferredFrees);
+
+            const callback = JSC.OpaqueWrap(Store, processDeferredFrees);
+            bun.assert(vm.after_event_loop_callback == null or vm.after_event_loop_callback == @as(?JSC.OpaqueCallback, callback));
+            vm.after_event_loop_callback = callback;
             vm.after_event_loop_callback_ctx = this;
         }
     };
diff --git a/src/async/windows_event_loop.zig b/src/async/windows_event_loop.zig
index 0943d1959b..6ac815a849 100644
--- a/src/async/windows_event_loop.zig
+++ b/src/async/windows_event_loop.zig
@@ -358,8 +358,10 @@ pub const FilePoll = struct {
 
             poll.flags.insert(.ignore_updates);
             this.pending_free_tail = poll;
-            bun.assert(vm.after_event_loop_callback == null or vm.after_event_loop_callback == @as(?JSC.OpaqueCallback, @ptrCast(&processDeferredFrees)));
-            vm.after_event_loop_callback = @ptrCast(&processDeferredFrees);
+
+            const callback = JSC.OpaqueWrap(Store, processDeferredFrees);
+            bun.assert(vm.after_event_loop_callback == null or vm.after_event_loop_callback == @as(?JSC.OpaqueCallback, callback));
+            vm.after_event_loop_callback = callback;
             vm.after_event_loop_callback_ctx = this;
         }
     };