diff --git a/storage/perfschema/service_pfs_notification.cc b/storage/perfschema/service_pfs_notification.cc
index 61eebbb..45e544c 100644
--- a/storage/perfschema/service_pfs_notification.cc
+++ b/storage/perfschema/service_pfs_notification.cc
@@ -136,7 +136,7 @@ struct PFS_notification_registry {
     }
   }
 
-  bool is_empty() { return m_count > 0; }
+  bool is_empty() { return m_count == 0; }
 
   /**
     Add a new registration.