--- a/python/mozbuild/mozbuild/frontend/emitter.py

+++ b/python/mozbuild/mozbuild/frontend/emitter.py

@@ -1127,11 +1127,6 @@

                 raise SandboxValidationError('Path specified in LOCAL_INCLUDES '

                     'does not exist: %s (resolved to %s)' % (local_include,

                     full_path), context)

-            if (full_path == context.config.topsrcdir or

-                    full_path == context.config.topobjdir):

-                raise SandboxValidationError('Path specified in LOCAL_INCLUDES '

-                    'is not allowed: %s (resolved to %s)' % (local_include,

-                    full_path), context)

             include_obj = LocalInclude(context, local_include)

             local_includes.append(include_obj.path.full_path)

             yield include_obj