diff --git a/server/core/backend.cc b/server/core/backend.cc
index 348ac5329..201ae5c6d 100644
--- a/server/core/backend.cc
+++ b/server/core/backend.cc
@@ -53,6 +53,7 @@ void Backend::close(close_type type)
     {
         m_closed = true;
         m_closed_at = time(NULL);
+        m_session_commands.clear();
 
         if (in_use())
         {