2 files changed, 11 insertions, 4 deletions
diff --git a/ext/tk/lib/tk.rb b/ext/tk/lib/tk.rb
index 312452df1..907f602da 100644
--- a/ext/tk/lib/tk.rb
+++ b/ext/tk/lib/tk.rb
@@ -3165,9 +3165,9 @@ class TkObject<TkKernel
   end
 
   def tk_trace_variable(v)
-    unless v.kind_of?(TkVariable)
-      fail(ArgumentError, "type error (#{v.class}); must be TkVariable object")
-    end
+    #unless v.kind_of?(TkVariable)
+    #  fail(ArgumentError, "type error (#{v.class}); must be TkVariable object")
+    #end
     v
   end
   private :tk_trace_variable
diff --git a/ext/tk/lib/tk/menu.rb b/ext/tk/lib/tk/menu.rb
index f0f5dcd2e..4b94ccd91 100644
--- a/ext/tk/lib/tk/menu.rb
+++ b/ext/tk/lib/tk/menu.rb
@@ -402,13 +402,20 @@ class TkOptionMenubutton<TkMenubutton
     end
   end
 
-  def initialize(parent=nil, var=TkVariable.new, firstval=nil, *vals)
+  def initialize(parent=nil, var=nil, firstval=nil, *vals)
     if parent.kind_of? Hash
        keys = _symbolkey2str(parent)
        parent = keys['parent']
        var = keys['variable'] if keys['variable']
        firstval, *vals = keys['values']
     end
+    if parent.kind_of? TkVariable
+      vals.unshift(firstval) if firstval
+      firstval = var 
+      var = parent
+      parent = nil
+    end
+    var = TkVariable.new unless var
     fail 'variable option must be TkVariable' unless var.kind_of? TkVariable
     @variable = var
     firstval = @variable.value unless firstval