diff --git a/IPython/extensions/rmagic.py b/IPython/extensions/rmagic.py
index 42fb030..453d78c 100644
--- a/IPython/extensions/rmagic.py
+++ b/IPython/extensions/rmagic.py
@@ -599,7 +599,7 @@ class RMagics(Magics):
             else:
                 text_result, result, visible = self.eval(code)
                 text_output += text_result
-                if(visible):
+                if visible:
                     old_writeconsole = ri.get_writeconsole()
                     ri.set_writeconsole(self.write_console) 
                     ro.r.show(result)