diff --git a/scripts/waifulib/owcc.py b/scripts/waifulib/owcc.py
index 73b5827a..efee4131 100755
--- a/scripts/waifulib/owcc.py
+++ b/scripts/waifulib/owcc.py
@@ -116,7 +116,9 @@ def configure(conf):
 	conf.owcc_common_flags()
 	conf.cc_load_tools()
 	conf.cc_add_flags()
+	conf.env.append_unique('CFLAGS','-Wc,-xx')
 	conf.cxx_load_tools()
 	conf.cxx_add_flags()
+	conf.env.append_unique('CXXFLAGS','-Wc,-xx')
 	conf.link_add_flags()
 	conf.owcc_detect_platform()