diff --git a/src/libstore/local-overlay-store.cc b/src/libstore/local-overlay-store.cc
index dfd2f0d343e..04a1717cd66 100644
--- a/src/libstore/local-overlay-store.cc
+++ b/src/libstore/local-overlay-store.cc
@@ -247,6 +247,8 @@ Path LocalOverlayStore::toRealPathForHardLink(const StorePath & path)
 
 void LocalOverlayStore::remountIfNecessary()
 {
+    if (!_remountRequired) return;
+
     if (remountHook.get().empty()) {
         warn("'%s' needs remounting, set remount-hook to do this automatically", realStoreDir.get());
     } else {