ALTLVDS_RX MegaWizard only shows an input clock frequency of 100 MHz

[h=1]I'm using Quartus 12.0 SP2 (32-bit) and I'm trying to implement the ALTLVDS_RX on Cyclon V. However, the Megawizard shows constantly an input clock frequency of 100 MHz. It's a bug isn't ? Anyone has a work-around for this problem ?[/h]

best regards

Joel