Row_Number is not recognized as function

[ERPrun-DM]

If you type Row_N and confirm intellisense's suggestion with a tab you end up with [ROW_NUMBER] instead of ROW_NUMBER()
I wish it would be completed by the condition over(PARTITION BY) and an intellisense suggestion for the 'order by' - part too.
Furthermore, the 'condition' PARTITION is entirely missing in intellisense.