diff --git a/setup.cfg b/setup.cfg
index e9df7b43..4e6332a4 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -35,9 +35,9 @@ autodoc_index_modules = True
 autodoc_exclude_modules =
     ironic_lib.common.i18n
     ironic_lib.tests.*
-warnerrors = True
 
 [build_sphinx]
 all_files = 1
 build-dir = doc/build
 source-dir = doc/source
+warning-is-error = 1