diff --git a/benches/affine.rs b/benches/affine.rs
index f235b5f67..0623bf8f3 100644
--- a/benches/affine.rs
+++ b/benches/affine.rs
@@ -68,6 +68,7 @@ impl<F: FieldExt + TensorType> Circuit<F> for MyCircuit<F> {
 }
 
 fn runaffine(c: &mut Criterion) {
+    colog::init();
     let mut group = c.benchmark_group("affine");
     for &len in [4, 8, 16, 32, 64].iter() {
         unsafe {
diff --git a/benches/cnvrl.rs b/benches/cnvrl.rs
index 86fd20db7..3c8e2db07 100644
--- a/benches/cnvrl.rs
+++ b/benches/cnvrl.rs
@@ -99,6 +99,7 @@ where
 }
 
 fn runcnvrl(c: &mut Criterion) {
+    colog::init();
     let mut group = c.benchmark_group("cnvrl");
 
     for size in [1, 2, 4, 8].iter() {
diff --git a/benches/range.rs b/benches/range.rs
index 20883fbd8..123c6a1b5 100644
--- a/benches/range.rs
+++ b/benches/range.rs
@@ -55,6 +55,7 @@ impl<F: FieldExt + TensorType> Circuit<F> for MyCircuit<F> {
 }
 
 fn runrange(c: &mut Criterion) {
+    colog::init();
     let mut group = c.benchmark_group("range");
     for &len in [4, 8, 16, 32, 64, 128].iter() {
         unsafe {
diff --git a/benches/relu.rs b/benches/relu.rs
index 0d69ddc97..26a164744 100644
--- a/benches/relu.rs
+++ b/benches/relu.rs
@@ -53,6 +53,7 @@ impl<F: FieldExt + TensorType, NL: 'static + Nonlinearity<F> + Clone> Circuit<F>
 }
 
 fn runrelu(c: &mut Criterion) {
+    colog::init();
     let mut group = c.benchmark_group("relu");
 
     let mut rng = rand::thread_rng();