invalid-arch-string-in-source-relation amd64

[Shaun Jackman]

What's wrong with this Build-Depends line?

Build-Depends: ia32-libs-dev [amd64], debhelper (>= 4.1.16)

E: eagle source: invalid-arch-string-in-source-relation amd64
[build-depends: ia32-libs-dev [amd64]]

Thanks,
Shaun

debhelper 4.9.5
lintian 1.23.11