diff --git a/ports/wasm/build_runtime.js b/ports/wasm/build_runtime.js
index 442e56f..ca5a4b9 100644
--- a/ports/wasm/build_runtime.js
+++ b/ports/wasm/build_runtime.js
@@ -384,9 +384,9 @@ module.exports = function buildRuntime(module, builder) {
                     "error",
                     c.i32_const(errs.ACCESSING_NOT_ASSIGNED_SIGNAL.code),
                     c.i32_const(errs.ACCESSING_NOT_ASSIGNED_SIGNAL.pointer),
-                    c.i32_const(0),
-                    c.i32_const(0),
-                    c.i32_const(0),
+                    c.getLocal("cIdx"),
+                    c.getLocal("component"),
+                    c.getLocal("signal"),
                     c.i32_const(0)
                 )
             )