[p4] diff between two revisions

[Jeff Sparks]

Sorry, I'm sure this is obvious but I haven't found an answer after almost an hour of googling.  I just want the diff between two revisions, the p4 equivalent of

    svn diff -r1499:1186 Makefile

I've tried things like

terra% p4 changes Makefile
Change 1499 on 2007/01/16 by jeff at terra 'blah'
Change 1186 on 2007/01/11 by jeff at terra 'blah blah'
Change 8 on 2006/11/30 by peter at firma 'initial'
terra% p4 diff Makefile#1499 Makefile#1186
Makefile#1499 - file(s) up-to-date.
Makefile#1186 - file(s) up-to-date.
terra% p4 diff2 Makefile#1499 Makefile#1186
No file(s) at that revision.

but I'm just flailing away.  I can't believe I can't figure this out.  What am I missing?
--Jeff

 
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