diff --git a/test/mjsunit/wasm/params.js b/test/mjsunit/wasm/params.js
index 180ab1c..fe1b7d4 100644
--- a/test/mjsunit/wasm/params.js
+++ b/test/mjsunit/wasm/params.js
@@ -79,7 +79,7 @@
     print("type = " + t + ", which = " + which);
 
     var builder = new WasmModuleBuilder();
-    builder.addFunction("select", [10,t,t,t,t,t,t,t,t,t,t,1,t])
+    builder.addFunction("select", makeSig([t,t,t,t,t,t,t,t,t,t], [t]))
       .addBody([kExprGetLocal, which])
       .exportFunc();