diff --git a/Cargo.lock b/Cargo.lock
index c1baa4e..ec214da 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -285,7 +285,7 @@ checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 
 [[package]]
 name = "serac"
-version = "0.4.3"
+version = "0.4.4"
 dependencies = [
  "cortex-m",
  "cortex-m-rt",
diff --git a/serac/Cargo.toml b/serac/Cargo.toml
index 6439d7c..ee56bd9 100644
--- a/serac/Cargo.toml
+++ b/serac/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "serac"
-version = "0.4.3"
+version = "0.4.4"
 edition = "2024"
 description = "A static, modular, and light-weight serialization framework."
 license = "CC-BY-NC-SA-4.0"
diff --git a/serac/src/encoding/vanilla.rs b/serac/src/encoding/vanilla.rs
index 27bf571..5e15574 100644
--- a/serac/src/encoding/vanilla.rs
+++ b/serac/src/encoding/vanilla.rs
@@ -267,6 +267,35 @@ unsafe impl<T: Size> Size for Option<T> {
     const SIZE: usize = 1 + T::SIZE;
 }
 
+// unit impl (no-op)
+
+impl SerializeIter for () {
+    fn serialize_iter<'a>(
+        &self,
+        _dst: impl IntoIterator<Item = &'a mut <Vanilla as Encoding>::Word>,
+    ) -> Result<usize, error::EndOfInput>
+    where
+        <Vanilla as Encoding>::Word: 'a,
+    {
+        Ok(0)
+    }
+
+    fn deserialize_iter<'a>(
+        _src: impl IntoIterator<Item = &'a <Vanilla as Encoding>::Word>,
+    ) -> Result<Self, error::Error>
+    where
+        <Vanilla as Encoding>::Word: 'a,
+    {
+        Ok(())
+    }
+}
+
+unsafe impl Size for () {
+    const SIZE: usize = 0;
+}
+
+unsafe impl SerializeBuf<0> for () {}
+
 // PhantomData impl (no-op)
 
 impl<T> SerializeIter for PhantomData<T> {