diff --git a/python/triton_tvm_ffi/driver.py b/python/triton_tvm_ffi/driver.py
index d761656..686a1a8 100644
--- a/python/triton_tvm_ffi/driver.py
+++ b/python/triton_tvm_ffi/driver.py
@@ -56,11 +56,7 @@ class TVMLauncher(object):
                     shared_memory,
                     global_scratch,
                     profile_scratch,
-                    *(
-                        arg
-                        for arg, type in zip(args, self.signature)
-                        if type != "constexpr"
-                    ),
+                    *args,
                 )
             )
         else:
@@ -164,10 +160,7 @@ class TVMLauncher(object):
         )
         template: jinja2.Template = env.get_template("launch.c.j2")
         signature: List[int] = list(
-            filter(
-                lambda t: t != "void",
                 map(lambda t: type_to_ctype(string_to_type(t)), self.signature),
-            )
         )
         html: str = template.render(signature=signature)
         return html
diff --git a/python/triton_tvm_ffi/templates/launch.c.j2 b/python/triton_tvm_ffi/templates/launch.c.j2
index 53caf94..0b20889 100644
--- a/python/triton_tvm_ffi/templates/launch.c.j2
+++ b/python/triton_tvm_ffi/templates/launch.c.j2
@@ -53,11 +53,12 @@ extern "C"
       {{ type }} arg{{ loop.index0 }} = ((DLTensor*)(args[{{ loop.index0 + 10 }}].v_c_str + sizeof(TVMFFIObject)))->data;
   {% elif type == "int32_t" %}
       {{ type }} arg{{ loop.index0 }} = args[{{ loop.index0 + 10 }}].v_int64;
+  {% elif type == "void" %}
   {% else %}
       assert(false, "unsupported type yet {{ type }}");
   {% endif %}
 {% endfor %}
-    void *params[] = { {% for type in signature %} &arg{{ loop.index0 }}, {% endfor %}&globalScratch, &profileScratch };
+    void *params[] = { {% for type in signature %} {% if type != "void" %} &arg{{ loop.index0 }}, {% endif %} {% endfor %}&globalScratch, &profileScratch };
     cuLaunchKernelEx(&config, function, params, NULL);
   }
 }