diff --git a/serde_core/src/de/impls.rs b/serde_core/src/de/impls.rs
index ab1a893c..06bd8804 100644
--- a/serde_core/src/de/impls.rs
+++ b/serde_core/src/de/impls.rs
@@ -1,5 +1,11 @@
 use crate::lib::*;
 
+// Explicit prelude import for wasm32v1-none target compatibility
+// These may appear unused but are required for ?Sized bounds on wasm32v1-none
+#[allow(unused_imports)]
+#[cfg(not(feature = "std"))]
+use ::core::prelude::rust_2021::*;
+
 use crate::de::{
     Deserialize, Deserializer, EnumAccess, Error, MapAccess, SeqAccess, Unexpected, VariantAccess,
     Visitor,
diff --git a/serde_core/src/de/mod.rs b/serde_core/src/de/mod.rs
index 2518ae68..728bb17c 100644
--- a/serde_core/src/de/mod.rs
+++ b/serde_core/src/de/mod.rs
@@ -114,6 +114,11 @@
 
 use crate::lib::*;
 
+// Explicit prelude import for wasm32v1-none target compatibility
+#[allow(unused_imports)]
+#[cfg(not(feature = "std"))]
+use ::core::prelude::rust_2021::*;
+
 ////////////////////////////////////////////////////////////////////////////////
 
 pub mod value;
diff --git a/serde_core/src/private/doc.rs b/serde_core/src/private/doc.rs
index 2cc07f0d..dddc17bc 100644
--- a/serde_core/src/private/doc.rs
+++ b/serde_core/src/private/doc.rs
@@ -2,6 +2,11 @@
 
 use crate::lib::*;
 
+// Explicit prelude import for wasm32v1-none target compatibility
+#[allow(unused_imports)]
+#[cfg(not(feature = "std"))]
+use ::core::prelude::rust_2021::*;
+
 use crate::ser;
 
 #[doc(hidden)]
diff --git a/serde_core/src/ser/fmt.rs b/serde_core/src/ser/fmt.rs
index 4b1549f0..9fbf148c 100644
--- a/serde_core/src/ser/fmt.rs
+++ b/serde_core/src/ser/fmt.rs
@@ -1,4 +1,10 @@
 use crate::lib::*;
+
+// Explicit prelude import for wasm32v1-none target compatibility
+#[allow(unused_imports)]
+#[cfg(not(feature = "std"))]
+use ::core::prelude::rust_2021::*;
+
 use crate::ser::{Error, Impossible, Serialize, Serializer};
 
 impl Error for fmt::Error {
diff --git a/serde_core/src/ser/impls.rs b/serde_core/src/ser/impls.rs
index a7a175db..553b2ab4 100644
--- a/serde_core/src/ser/impls.rs
+++ b/serde_core/src/ser/impls.rs
@@ -1,5 +1,11 @@
 use crate::lib::*;
 
+// Explicit prelude import for wasm32v1-none target compatibility
+// These may appear unused but are required for ?Sized bounds on wasm32v1-none
+#[allow(unused_imports)]
+#[cfg(not(feature = "std"))]
+use ::core::prelude::rust_2021::*;
+
 use crate::ser::{Error, Serialize, SerializeTuple, Serializer};
 
 ////////////////////////////////////////////////////////////////////////////////
diff --git a/serde_core/src/ser/impossible.rs b/serde_core/src/ser/impossible.rs
index fe69ae24..dfa3910b 100644
--- a/serde_core/src/ser/impossible.rs
+++ b/serde_core/src/ser/impossible.rs
@@ -2,6 +2,11 @@
 
 use crate::lib::*;
 
+// Explicit prelude import for wasm32v1-none target compatibility
+#[allow(unused_imports)]
+#[cfg(not(feature = "std"))]
+use ::core::prelude::rust_2021::*;
+
 use crate::ser::{
     self, Serialize, SerializeMap, SerializeSeq, SerializeStruct, SerializeStructVariant,
     SerializeTuple, SerializeTupleStruct, SerializeTupleVariant,
diff --git a/serde_core/src/ser/mod.rs b/serde_core/src/ser/mod.rs
index 62e59d98..eaaf95ff 100644
--- a/serde_core/src/ser/mod.rs
+++ b/serde_core/src/ser/mod.rs
@@ -109,6 +109,11 @@
 
 use crate::lib::*;
 
+// Explicit prelude import for wasm32v1-none target compatibility
+#[allow(unused_imports)]
+#[cfg(not(feature = "std"))]
+use ::core::prelude::rust_2021::*;
+
 mod fmt;
 mod impls;
 mod impossible;