diff --git a/elprop/src/bin/code/data.rs b/elprop/src/bin/code/data.rs
index fa90a50f..c0bd18c2 100755
--- a/elprop/src/bin/code/data.rs
+++ b/elprop/src/bin/code/data.rs
@@ -20,6 +20,7 @@ pub(crate) enum Type {
     HashTable,
     Record,
     ByteFn,
+    Byte,
     Subr,
     Buffer,
     Nil,
@@ -57,6 +58,7 @@ impl Type {
             }
             Type::HashTable => todo!("Strategy for HashTable not implemented"),
             Type::ByteFn => any::<u8>().prop_map(ArbitraryType::ByteFn).boxed(),
+            Type::Byte => any::<u8>().prop_map(ArbitraryType::Byte).boxed(),
             Type::Subr => todo!("Strategy for Subr not implemented"),
             Type::Buffer => any::<String>().prop_map(ArbitraryType::Buffer).boxed(),
             Type::Nil => Just(ArbitraryType::Nil).boxed(),
@@ -160,6 +162,7 @@ pub(crate) enum ArbitraryType {
     Nil,
     Function(u8),
     ByteFn(u8),
+    Byte(u8),
     Char(char),
     Buffer(String),
     Subr(u8),
@@ -267,6 +270,7 @@ impl std::fmt::Display for ArbitraryType {
                 }
                 write!(f, ") nil)")
             }
+            ArbitraryType::Byte(n) => write!(f, "{n}"),
             ArbitraryType::Buffer(name) => {
                 write!(f, "(generate-new-buffer {name})")
             }
@@ -369,6 +373,7 @@ impl Function {
             "Number" | "NumberValue" => Type::Multiple(vec![Type::Integer, Type::Float]),
             "Object" => Type::Unknown,
             "usize" | "u64" => Type::PosInteger,
+            "u8" => Type::Byte,
             "isize" | "i64" => Type::Integer,
             "str" | "String" | "LispString" => Type::String,
             "bool" | "OptionalFlag" => Type::Boolean,
diff --git a/elprop/src/elprop.el b/elprop/src/elprop.el
index 99cfaf53..df3b8724 100644
--- a/elprop/src/elprop.el
+++ b/elprop/src/elprop.el
@@ -10,6 +10,7 @@
   (kill-buffer "*elprop-output*"))
 
 (let* ((buffer "*elprop-output*")
+       (process-connection-type nil)
        (process (start-process "elprop-process" buffer (getenv "ELPROP_RUNNER")))
        (runner-count 0)
        (pointer 1))
diff --git a/src/alloc.rs b/src/alloc.rs
index c1e22af9..78fd066a 100644
--- a/src/alloc.rs
+++ b/src/alloc.rs
@@ -5,7 +5,7 @@ use crate::core::object::{
     ByteFn, ByteString, FnArgs, Gc, IntoObject, LispVec, Object, RecordBuilder, Symbol, NIL,
 };
 use anyhow::{ensure, Result};
-use rune_macros::defun;
+use rune_macros::{defun, elprop};
 
 #[defun]
 pub(crate) fn list<'ob>(objects: &[Object<'ob>], cx: &'ob Context) -> Object<'ob> {
@@ -63,6 +63,7 @@ pub(crate) fn make_byte_code<'ob>(
 }
 
 #[defun]
+#[elprop(u8, _)]
 fn make_vector(length: usize, init: Object) -> Vec<Object> {
     vec![init; length]
 }