diff --git a/src/os/filestore/FileStore.cc b/src/os/filestore/FileStore.cc
index 95d7bc08739..eef82b72618 100644
--- a/src/os/filestore/FileStore.cc
+++ b/src/os/filestore/FileStore.cc
@@ -4929,7 +4929,7 @@ int FileStore::omap_get_values(const coll_t& _c, const ghobject_t &hoid,
   const coll_t& c = !_need_temp_object_collection(_c, hoid) ? _c : _c.get_temp();
   dout(15) << __func__ << " " << c << "/" << hoid << dendl;
   Index index;
-  const char *where = 0;
+  const char *where = "()";
   int r = get_index(c, &index);
   if (r < 0) {
     where = " (get_index)";