1 files changed, 6 insertions, 2 deletions
diff --git a/ext/tk/lib/tk.rb b/ext/tk/lib/tk.rb
index 404f8bf9f8..807ccd2285 100644
--- a/ext/tk/lib/tk.rb
+++ b/ext/tk/lib/tk.rb
@@ -179,8 +179,12 @@ module TkComm
   private :_genobj_for_tkwidget
   module_function :_genobj_for_tkwidget
 
-  def _at(x,y)
-    "@#{Integer(x)},#{Integer(y)}"
+  def _at(x,y=nil)
+    if y
+      "@#{Integer(x)},#{Integer(y)}"
+    else
+      "@#{Integer(x)}"
+    end
   end
   module_function :_at