diff --git a/src/os/bluestore/BlueStore.cc b/src/os/bluestore/BlueStore.cc
index dd4e1106c28..0d564036c58 100644
--- a/src/os/bluestore/BlueStore.cc
+++ b/src/os/bluestore/BlueStore.cc
@@ -6016,6 +6016,13 @@ int BlueStore::mkfs()
   int r;
   uuid_d old_fsid;
 
+  if (cct->_conf->osd_max_object_size > OBJECT_MAX_SIZE) {
+    derr << __func__ << " osd_max_object_size "
+	 << cct->_conf->osd_max_object_size << " > bluestore max "
+	 << OBJECT_MAX_SIZE << dendl;
+    return -EINVAL;
+  }
+
   {
     string done;
     r = read_meta("mkfs_done", &done);
@@ -6650,6 +6657,13 @@ int BlueStore::_mount(bool kv_only, bool open_db)
     }
   }
 
+  if (cct->_conf->osd_max_object_size > OBJECT_MAX_SIZE) {
+    derr << __func__ << " osd_max_object_size "
+	 << cct->_conf->osd_max_object_size << " > bluestore max "
+	 << OBJECT_MAX_SIZE << dendl;
+    return -EINVAL;
+  }
+
   int r = _open_path();
   if (r < 0)
     return r;