diff --git a/packages/core/interfaces/src/compilerSupport/aquaTypeDefinitions.ts b/packages/core/interfaces/src/compilerSupport/aquaTypeDefinitions.ts
index d86abb4e..2ad90707 100644
--- a/packages/core/interfaces/src/compilerSupport/aquaTypeDefinitions.ts
+++ b/packages/core/interfaces/src/compilerSupport/aquaTypeDefinitions.ts
@@ -264,6 +264,8 @@ export interface ServiceDef {
    * List of functions which the service consists of
    */
   functions:
-    | LabeledProductType<ArrowType<LabeledProductType<SimpleTypes>>>
+    | LabeledProductType<
+        ArrowType<LabeledProductType<SimpleTypes> | UnlabeledProductType>
+      >
     | NilType;
 }
diff --git a/packages/core/js-client/src/compilerSupport/conversions.ts b/packages/core/js-client/src/compilerSupport/conversions.ts
index 72ab57f3..85ee33d3 100644
--- a/packages/core/js-client/src/compilerSupport/conversions.ts
+++ b/packages/core/js-client/src/compilerSupport/conversions.ts
@@ -22,6 +22,7 @@ import {
   NonArrowSimpleType,
   ScalarType,
   SimpleTypes,
+  UnlabeledProductType,
 } from "@fluencelabs/interfaces";
 
 import { ParticleContext } from "../jsServiceHost/interfaces.js";
@@ -203,7 +204,9 @@ export function js2aqua(
 
 export const wrapFunction = (
   func: ServiceImpl[string],
-  schema: ArrowWithoutCallbacks | ArrowType<LabeledProductType<SimpleTypes>>,
+  schema:
+    | ArrowWithoutCallbacks
+    | ArrowType<LabeledProductType<SimpleTypes> | UnlabeledProductType>,
 ): ServiceImpl[string] => {
   return async (...args) => {
     // eslint-disable-next-line @typescript-eslint/consistent-type-assertions
diff --git a/packages/core/js-client/src/jsPeer/FluencePeer.ts b/packages/core/js-client/src/jsPeer/FluencePeer.ts
index 9d43bfc1..0adb4dbd 100644
--- a/packages/core/js-client/src/jsPeer/FluencePeer.ts
+++ b/packages/core/js-client/src/jsPeer/FluencePeer.ts
@@ -548,7 +548,7 @@ export abstract class FluencePeer {
                       ) == null
                     ) {
                       // try to finish script if fire-and-forget enabled
-                      item.onSuccess({});
+                      item.onSuccess(null);
                     }
                   })
                   .catch((e: unknown) => {
@@ -638,7 +638,9 @@ export abstract class FluencePeer {
                   ) == null
                 ) {
                   // try to finish script if fire-and-forget enabled
-                  item.onSuccess({});
+                  setTimeout(() => {
+                    item.onSuccess(null);
+                  }, 0);
                 }
               }