diff --git a/library/proc_macro/src/bridge/client.rs b/library/proc_macro/src/bridge/client.rs
index e7d547966a5d..4e519e56a1ed 100644
--- a/library/proc_macro/src/bridge/client.rs
+++ b/library/proc_macro/src/bridge/client.rs
@@ -144,7 +144,7 @@ macro_rules! define_client_side {
 
                     buf.clear();
                     api_tags::Method::$name(api_tags::$name::$method).encode(&mut buf, &mut ());
-                    reverse_encode!(buf; $($arg),*);
+                    $($arg.encode(&mut buf, &mut ());)*
 
                     buf = bridge.dispatch.call(buf);
 
diff --git a/library/proc_macro/src/bridge/mod.rs b/library/proc_macro/src/bridge/mod.rs
index d60a76fff5dc..7fd67ba465ef 100644
--- a/library/proc_macro/src/bridge/mod.rs
+++ b/library/proc_macro/src/bridge/mod.rs
@@ -119,26 +119,6 @@ macro_rules! with_api_handle_types {
     };
 }
 
-// FIXME(eddyb) this calls `encode` for each argument, but in reverse,
-// to match the ordering in `reverse_decode`.
-macro_rules! reverse_encode {
-    ($writer:ident;) => {};
-    ($writer:ident; $first:ident $(, $rest:ident)*) => {
-        reverse_encode!($writer; $($rest),*);
-        $first.encode(&mut $writer, &mut ());
-    }
-}
-
-// FIXME(eddyb) this calls `decode` for each argument, but in reverse,
-// to avoid borrow conflicts from borrows started by `&mut` arguments.
-macro_rules! reverse_decode {
-    ($reader:ident, $s:ident;) => {};
-    ($reader:ident, $s:ident; $first:ident: $first_ty:ty $(, $rest:ident: $rest_ty:ty)*) => {
-        reverse_decode!($reader, $s; $($rest: $rest_ty),*);
-        let $first = <$first_ty>::decode(&mut $reader, $s);
-    }
-}
-
 #[allow(unsafe_code)]
 mod arena;
 #[allow(unsafe_code)]
diff --git a/library/proc_macro/src/bridge/server.rs b/library/proc_macro/src/bridge/server.rs
index 5beda7c3c96e..724ccbd96c59 100644
--- a/library/proc_macro/src/bridge/server.rs
+++ b/library/proc_macro/src/bridge/server.rs
@@ -178,7 +178,7 @@ macro_rules! define_dispatcher_impl {
                     $(api_tags::Method::$name(m) => match m {
                         $(api_tags::$name::$method => {
                             let mut call_method = || {
-                                reverse_decode!(reader, handle_store; $($arg: $arg_ty),*);
+                                $(let $arg = <$arg_ty>::decode(&mut reader, handle_store);)*
                                 $name::$method(server, $($arg),*)
                             };
                             // HACK(eddyb) don't use `panic::catch_unwind` in a panic.