diff --git a/nalgebra-sparse/src/coo.rs b/nalgebra-sparse/src/coo.rs
index d3612bdc..0cebb725 100644
--- a/nalgebra-sparse/src/coo.rs
+++ b/nalgebra-sparse/src/coo.rs
@@ -1,10 +1,11 @@
 //! An implementation of the COO sparse matrix format.
 
 use crate::SparseFormatError;
-use std::borrow::Cow;
 
 #[cfg(feature = "serde-serialize")]
 use serde::{de, Deserialize, Deserializer, Serialize, Serializer};
+#[cfg(feature = "serde-serialize")]
+use std::borrow::Cow;
 
 /// A COO representation of a sparse matrix.
 ///
diff --git a/nalgebra-sparse/src/csc.rs b/nalgebra-sparse/src/csc.rs
index 28af852d..bd70d4c8 100644
--- a/nalgebra-sparse/src/csc.rs
+++ b/nalgebra-sparse/src/csc.rs
@@ -7,12 +7,13 @@ use crate::cs::{CsLane, CsLaneIter, CsLaneIterMut, CsLaneMut, CsMatrix};
 use crate::csr::CsrMatrix;
 use crate::pattern::{SparsityPattern, SparsityPatternFormatError, SparsityPatternIter};
 use crate::{SparseEntry, SparseEntryMut, SparseFormatError, SparseFormatErrorKind};
-use std::borrow::Cow;
 
 use nalgebra::Scalar;
 use num_traits::One;
 #[cfg(feature = "serde-serialize")]
 use serde::{de, Deserialize, Deserializer, Serialize, Serializer};
+#[cfg(feature = "serde-serialize")]
+use std::borrow::Cow;
 use std::slice::{Iter, IterMut};
 
 /// A CSC representation of a sparse matrix.
diff --git a/nalgebra-sparse/src/csr.rs b/nalgebra-sparse/src/csr.rs
index 43fb2118..bd43927d 100644
--- a/nalgebra-sparse/src/csr.rs
+++ b/nalgebra-sparse/src/csr.rs
@@ -6,12 +6,13 @@ use crate::cs::{CsLane, CsLaneIter, CsLaneIterMut, CsLaneMut, CsMatrix};
 use crate::csc::CscMatrix;
 use crate::pattern::{SparsityPattern, SparsityPatternFormatError, SparsityPatternIter};
 use crate::{SparseEntry, SparseEntryMut, SparseFormatError, SparseFormatErrorKind};
-use std::borrow::Cow;
 
 use nalgebra::Scalar;
 use num_traits::One;
 #[cfg(feature = "serde-serialize")]
 use serde::{de, Deserialize, Deserializer, Serialize, Serializer};
+#[cfg(feature = "serde-serialize")]
+use std::borrow::Cow;
 use std::iter::FromIterator;
 use std::slice::{Iter, IterMut};
 
diff --git a/nalgebra-sparse/src/pattern.rs b/nalgebra-sparse/src/pattern.rs
index 5f01ea10..a833250c 100644
--- a/nalgebra-sparse/src/pattern.rs
+++ b/nalgebra-sparse/src/pattern.rs
@@ -1,12 +1,13 @@
 //! Sparsity patterns for CSR and CSC matrices.
 use crate::cs::transpose_cs;
 use crate::SparseFormatError;
-use std::borrow::Cow;
 use std::error::Error;
 use std::fmt;
 
 #[cfg(feature = "serde-serialize")]
 use serde::{de, Deserialize, Deserializer, Serialize, Serializer};
+#[cfg(feature = "serde-serialize")]
+use std::borrow::Cow;
 
 /// A representation of the sparsity pattern of a CSR or CSC matrix.
 ///