Retirement - benefits - USA/Canada

I am an American citizen living in Canada, receiving USA Social Security and Canadian Pension Plan.  When I file my taxes in the USA, where exactly do I list my USA Social Security  (SSA-1099) since I pay taxes on all my  income in Canada?  I do file a form 2555 for my Canadian Social Security and the foreign exemption of  $107,600 totally eliminates the taxes from that income, but I just can't figure out where to input the money from my USA Social Security to indicate that it's being claimed in Canada.  Would appreciate any help.   Thanks in advance.