diff --git a/imgui.cpp b/imgui.cpp
index b4e81952..5c275317 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -239,7 +239,7 @@ JSC_SCALL(imgui_text, ImGui::Text("%s", str) )
 
 JSC_SCALL(imgui_button,
   bool gogo = ImGui::Button(str);
-  if (gogo && JS_IsFunction(js, argv[1]))
+  if (gogo && JS_IsFunction(argv[1]))
     JS_Call(js, argv[1], JS_NULL, 0, NULL);
   ret = JS_NewBool(js, gogo);
 )
diff --git a/transform.c b/transform.c
index 147e8c03..fb61e241 100644
--- a/transform.c
+++ b/transform.c
@@ -204,7 +204,7 @@ static JSValue js_transform_get_change_hook(JSContext *js, JSValueConst self)
 static JSValue js_transform_set_change_hook(JSContext *js, JSValueConst self, JSValue v)
 {
   transform *t = js2transform(js,self);
-  if (!JS_IsNull(v) && !JS_IsFunction(js,v)) return JS_ThrowReferenceError(js, "Hook must be a function.");
+  if (!JS_IsNull(v) && !JS_IsFunction(v)) return JS_ThrowReferenceError(js, "Hook must be a function.");
   JS_FreeValue(js,t->change_hook);
   t->change_hook = JS_DupValue(js,v);
   return JS_NULL;