diff --git a/src/engines/v8/v8.zig b/src/engines/v8/v8.zig
index d11aec7..aea8dce 100644
--- a/src/engines/v8/v8.zig
+++ b/src/engines/v8/v8.zig
@@ -274,13 +274,13 @@ pub const Env = struct {
     }
 
     // add a Native object in the Javascript context
-    pub fn addObject(self: Env, obj: anytype, name: []const u8) anyerror!void {
+    pub fn addObject(self: *Env, obj: anytype, name: []const u8) anyerror!void {
         if (self.js_ctx == null) {
             return error.EnvNotStarted;
         }
         return createJSObject(
             self.nat_ctx.alloc,
-            self.nat_ctx,
+            &self.nat_ctx,
             obj,
             name,
             self.js_ctx.?.getGlobal(),
diff --git a/src/interfaces.zig b/src/interfaces.zig
index 5e98f51..3a0ecc7 100644
--- a/src/interfaces.zig
+++ b/src/interfaces.zig
@@ -84,7 +84,7 @@ pub fn Env(
 
     // addObject() from native api into JS
     assertDecl(T, "addObject", fn (
-        self: T,
+        self: *T,
         obj: anytype,
         name: []const u8,
     ) anyerror!void);