diff --git a/src/convert/slices.rs b/src/convert/slices.rs
index a3cb6ec90b3f..9a4086e742cb 100644
--- a/src/convert/slices.rs
+++ b/src/convert/slices.rs
@@ -6,6 +6,7 @@ use core::str;
 
 use crate::convert::{FromWasmAbi, IntoWasmAbi, RefFromWasmAbi, RefMutFromWasmAbi, WasmAbi};
 use crate::convert::{OptionIntoWasmAbi, Stack};
+use crate::JsValue;
 
 if_std! {
     use core::mem;
@@ -123,7 +124,7 @@ macro_rules! vectors {
 }
 
 vectors! {
-    u8 i8 u16 i16 u32 i32 u64 i64 usize isize f32 f64
+    u8 i8 u16 i16 u32 i32 u64 i64 usize isize f32 f64 JsValue
 }
 
 if_std! {
@@ -202,41 +203,3 @@ impl RefFromWasmAbi for str {
         str::from_utf8_unchecked(<[u8]>::ref_from_abi(js, extra))
     }
 }
-
-if_std! {
-    use crate::JsValue;
-
-    impl IntoWasmAbi for Box<[JsValue]> {
-        type Abi = WasmSlice;
-
-        #[inline]
-        fn into_abi(self, extra: &mut Stack) -> WasmSlice {
-            let ptr = self.as_ptr();
-            let len = self.len();
-            mem::forget(self);
-            WasmSlice {
-                ptr: ptr.into_abi(extra),
-                len: len as u32,
-            }
-        }
-    }
-
-    impl OptionIntoWasmAbi for Box<[JsValue]> {
-        fn none() -> WasmSlice { null_slice() }
-    }
-
-    impl FromWasmAbi for Box<[JsValue]> {
-        type Abi = WasmSlice;
-
-        #[inline]
-        unsafe fn from_abi(js: WasmSlice, extra: &mut Stack) -> Self {
-            let ptr = <*mut JsValue>::from_abi(js.ptr, extra);
-            let len = js.len as usize;
-            Vec::from_raw_parts(ptr, len, len).into_boxed_slice()
-        }
-    }
-
-    impl OptionFromWasmAbi for Box<[JsValue]> {
-        fn is_none(slice: &WasmSlice) -> bool { slice.ptr == 0 }
-    }
-}