diff --git a/build-aux/automake.mk b/build-aux/automake.mk
index 8d7e8ae19..d65b6da6c 100644
--- a/build-aux/automake.mk
+++ b/build-aux/automake.mk
@@ -21,8 +21,12 @@ EXTRA_DIST += \
 	build-aux/xml2nroff
 
 FLAKE8_PYFILES += \
-    build-aux/dpdkstrip.py \
-    build-aux/gen_ofp_field_decoders \
-    build-aux/sodepends.py \
-    build-aux/soexpand.py \
-    build-aux/xml2nroff
+	build-aux/dpdkstrip.py \
+	build-aux/extract-ofp-actions \
+	build-aux/extract-ofp-errors \
+	build-aux/extract-ofp-fields \
+	build-aux/extract-ofp-msgs \
+	build-aux/gen_ofp_field_decoders \
+	build-aux/sodepends.py \
+	build-aux/soexpand.py \
+	build-aux/xml2nroff