diff --git a/lib/dynasm-backend/src/codegen_x64.rs b/lib/dynasm-backend/src/codegen_x64.rs
index ef056a695..30b5ea2bc 100644
--- a/lib/dynasm-backend/src/codegen_x64.rs
+++ b/lib/dynasm-backend/src/codegen_x64.rs
@@ -18,6 +18,7 @@ use wasmer_runtime_core::{
     memory::MemoryType,
     module::{ModuleInfo, ModuleInner},
     structures::{Map, TypedIndex},
+    typed_func::Wasm,
     types::{
         FuncIndex, FuncSig, ImportedMemoryIndex, LocalFuncIndex, LocalGlobalIndex,
         LocalMemoryIndex, LocalOrImport, MemoryIndex, SigIndex, Type, Value,
@@ -459,6 +460,10 @@ impl ProtectedCaller for X64ExecutionContext {
         })
     }
 
+    fn get_wasm_trampoline(&self, _module: &ModuleInner, _sig_index: SigIndex) -> Option<Wasm> {
+        unimplemented!()
+    }
+
     fn get_early_trapper(&self) -> Box<dyn UserTrapper> {
         pub struct Trapper;
 
diff --git a/lib/emscripten/src/varargs.rs b/lib/emscripten/src/varargs.rs
index cd9073cb9..3775d102c 100644
--- a/lib/emscripten/src/varargs.rs
+++ b/lib/emscripten/src/varargs.rs
@@ -20,4 +20,11 @@ impl VarArgs {
 
 unsafe impl WasmExternType for VarArgs {
     const TYPE: Type = Type::I32;
+
+    fn to_bits(self) -> u64 {
+        self.pointer as u64
+    }
+    fn from_bits(n: u64) -> Self {
+        Self { pointer: n as u32 }
+    }
 }
diff --git a/lib/wasi/src/ptr.rs b/lib/wasi/src/ptr.rs
index 56abb3b2d..da892d1bf 100644
--- a/lib/wasi/src/ptr.rs
+++ b/lib/wasi/src/ptr.rs
@@ -72,6 +72,16 @@ impl<T: Copy + ValueType> WasmPtr<T, Array> {
 
 unsafe impl<T: Copy, Ty> WasmExternType for WasmPtr<T, Ty> {
     const TYPE: Type = Type::I32;
+
+    fn to_bits(self) -> u64 {
+        self.offset as u64
+    }
+    fn from_bits(n: u64) -> Self {
+        Self {
+            offset: n as u32,
+            _phantom: PhantomData,
+        }
+    }
 }
 
 unsafe impl<T: Copy, Ty> ValueType for WasmPtr<T, Ty> {}