diff --git a/v2/pkg/commands/build/internal/backendjs/package.d.template b/v2/pkg/commands/build/internal/backendjs/package.d.template
index 0fb96222..b641e4c1 100644
--- a/v2/pkg/commands/build/internal/backendjs/package.d.template
+++ b/v2/pkg/commands/build/internal/backendjs/package.d.template
@@ -9,7 +9,7 @@
   * @function {{.Name}}
 {{range .Inputs}}  * @param {{"{"}}{{.JSType}}{{"}"}} {{.Name}}
 {{end}}  *
-  * @returns {Promise} 
+  * @returns {Promise<{{.OutputsAsTSText}}>} 
   */
 export function {{.Name}}({{.InputsAsTSText}}): Promise<{{.OutputsAsTSText}}>;
 {{end}}
\ No newline at end of file
diff --git a/v2/pkg/commands/build/internal/backendjs/package.template b/v2/pkg/commands/build/internal/backendjs/package.template
index e97a6dcb..64ae8313 100644
--- a/v2/pkg/commands/build/internal/backendjs/package.template
+++ b/v2/pkg/commands/build/internal/backendjs/package.template
@@ -9,7 +9,7 @@
   * @function {{.Name}}
 {{range .Inputs}}  * @param {{"{"}}{{.JSType}}{{"}"}} {{.Name}}
 {{end}}  *
-  * @returns {Promise} 
+  * @returns {Promise<{{.OutputsAsTSText}}>} 
   */
 export function {{.Name}}({{.InputsAsJSText}}) {
     return window.backend.{{$.Name}}.{{.Name}}({{.InputsAsJSText}});