diff --git a/crates/polars-plan/src/dsl/expr_dyn_fn.rs b/crates/polars-plan/src/dsl/expr_dyn_fn.rs
index 3c3745aae17..da7ace09b72 100644
--- a/crates/polars-plan/src/dsl/expr_dyn_fn.rs
+++ b/crates/polars-plan/src/dsl/expr_dyn_fn.rs
@@ -2,6 +2,7 @@ use std::fmt::Formatter;
 use std::ops::Deref;
 use std::sync::Arc;
 
+#[cfg(feature = "serde")]
 use polars_utils::pl_serialize::deserialize_map_bytes;
 #[cfg(feature = "serde")]
 use serde::{Deserialize, Deserializer, Serialize, Serializer};