diff --git a/Makefile b/Makefile
index 4358345e..87ccbffc 100644
--- a/Makefile
+++ b/Makefile
@@ -20,6 +20,7 @@ distcheck:
 	git clone --recursive . $(tmp)
 	make -C $(tmp)
 	make -C $(tmp) test
+	make -C $(tmp) bench
 	rm -rf $(tmp)
 
 .PHONY:doc
diff --git a/benches/dmat.rs b/benches/dmat.rs
index e6e3b82e..4755f5e7 100644
--- a/benches/dmat.rs
+++ b/benches/dmat.rs
@@ -3,10 +3,8 @@
 extern crate test;
 extern crate "nalgebra" as na;
 
-use std::rand::{IsaacRng, Rng};
 use test::Bencher;
-use na::{Inv};
-use na::{Vec2, Vec3, Vec4, Vec5, Vec6, DVec, Mat2, Mat3, Mat4, Mat5, Mat6, DMat};
+use na::{DVec, DMat};
 
 macro_rules! bench_mul_dmat(
     ($bh: expr, $nrows: expr, $ncols: expr) => {