Output port "lvds_clk" at altera_pll.v(295) has no driver

Hi,

I am using Quartus 13.1 and doing some verilog coding on Cyclone V. I am getting following warning messages:

Warning (10034): Output port "lvds_clk" at altera_pll.v(295) has no driver

Warning (10034): Output port "loaden" at altera_pll.v(296) has no driver

Could anyone please help me. Its urgent.

Thanks in advance !

-Shahbaz