diff --git a/lib/std/os/linux/IoUring.zig b/lib/std/os/linux/IoUring.zig
index a3723244cd9b23a04bd2dacf800fd83b95d39a4c..cfd31561de8fad4c70b78682e6aa3647068a79af 100644
--- a/lib/std/os/linux/IoUring.zig
+++ b/lib/std/os/linux/IoUring.zig
@@ -1230,7 +1230,7 @@ pub fn register_file_alloc_range(self: *IoUring, offset: u32, len: u32) !void {
         self.fd,
         .REGISTER_FILE_ALLOC_RANGE,
         @ptrCast(range),
-        @as(u32, @sizeOf(linux.io_uring_file_index_range)),
+        0,
     );
 
     return handle_registration_result(res);