diff --git a/sysjs/src/mach-sysjs.js b/sysjs/src/mach-sysjs.js
index e649008d..22ba05c4 100644
--- a/sysjs/src/mach-sysjs.js
+++ b/sysjs/src/mach-sysjs.js
@@ -338,7 +338,7 @@ const zig = {
       argv.push(zig.readObject(memory.slice(args + i * 16), memory));
     }
 
-    return zig.addValue(new values[id](argv));
+    return zig.addValue(new values[id](...argv));
   },
 
   wzLogWrite(str, len) {