--- a/.flake8
+++ b/.flake8
@@ -3,16 +3,17 @@
 ignore = E121, E123, E126, E129, E133, E226, E241, E242, E704, W503, E402, E741
 max-line-length = 99
 exclude =
     browser/extensions/mortar/ppapi/,
     browser/moz.configure,
     build/moz.configure/*.configure,
     build/pymake/,
     editor/libeditor/tests/browserscope/,
+    ipc/chromium/,
     gfx/angle/,
     gfx/harfbuzz,
     glx/skia/,
     js/*.configure,
     memory/moz.configure,
     mobile/android/*.configure,
     node_modules,
     security/nss/,