diff --git a/src/os/MemStore.cc b/src/os/MemStore.cc
index 66ad5570a4a..a1e1b274ec0 100644
--- a/src/os/MemStore.cc
+++ b/src/os/MemStore.cc
@@ -1243,6 +1243,7 @@ int MemStore::_omap_clear(coll_t cid, const ghobject_t &oid)
   if (!o)
     return -ENOENT;
   o->omap.clear();
+  o->omap_header.clear();
   return 0;
 }