diff --git a/src/nouveau/compiler/nak/qmd.rs b/src/nouveau/compiler/nak/qmd.rs
index 83e1b3ed772..19754501df7 100644
--- a/src/nouveau/compiler/nak/qmd.rs
+++ b/src/nouveau/compiler/nak/qmd.rs
@@ -3,6 +3,8 @@
 
 extern crate nvidia_headers;
 
+use std::mem::size_of;
+
 use compiler::bindings::*;
 use nak_bindings::*;
 use nvidia_headers::classes::{cla0c0, clc0c0, clc3c0, clc6c0, clcbc0, clcdc0};