1 files changed, 1 insertions, 1 deletions

diff --git a/sound/usb/usx2y/usX2Yhwdep.c b/sound/usb/usx2y/usX2Yhwdep.c
index 6495534e5bf6..1558a5c4094f 100644
--- a/sound/usb/usx2y/usX2Yhwdep.c
+++ b/sound/usb/usx2y/usX2Yhwdep.c
@@ -84,7 +84,7 @@ static int snd_us428ctls_mmap(struct snd_hwdep * hw, struct file *filp, struct v
                 us428->us428ctls_sharedmem->CtlSnapShotLast = -2;
         }
         area->vm_ops = &us428ctls_vm_ops;
-        area->vm_flags |= VM_RESERVED;
+        area->vm_flags |= VM_RESERVED | VM_DONTEXPAND;
         area->vm_private_data = hw->private_data;
         return 0;
 }