diff --git a/util/sconfig/sconfig.h b/util/sconfig/sconfig.h
index 119d7b5fbf..3ca13b3e7c 100644
--- a/util/sconfig/sconfig.h
+++ b/util/sconfig/sconfig.h
@@ -77,7 +77,7 @@ struct device {
 	struct reg *reg;
 };
 
-struct device *head;
+extern struct device *head;
 
 struct header;
 struct header {