diff --git a/src/libstore/local-store.cc b/src/libstore/local-store.cc
index 9bd03178e..3ad80bc4e 100644
--- a/src/libstore/local-store.cc
+++ b/src/libstore/local-store.cc
@@ -499,7 +499,7 @@ void LocalStore::makeStoreWritable()
         if (unshare(CLONE_NEWNS) == -1)
             throw SysError("setting up a private mount namespace");
 
-        if (mount(0, settings.nixStore.c_str(), 0, MS_REMOUNT | MS_BIND, 0) == -1)
+        if (mount(0, settings.nixStore.c_str(), "none", MS_REMOUNT | MS_BIND, 0) == -1)
             throw SysError(format("remounting %1% writable") % settings.nixStore);
     }
 #endif