diff --git a/cache.h b/cache.h
index 64ef86e..6913573 100644
--- a/cache.h
+++ b/cache.h
@@ -831,5 +831,6 @@
 void overlay_tree_on_cache(const char *tree_name, const char *prefix);
 
 char *alias_lookup(const char *alias);
+int split_cmdline(char *cmdline, const char ***argv);
 
 #endif /* CACHE_H */