diff --git a/server/modules/routing/readwritesplit/rwsplitsession.cc b/server/modules/routing/readwritesplit/rwsplitsession.cc
index f0af54a31..3142f5061 100644
--- a/server/modules/routing/readwritesplit/rwsplitsession.cc
+++ b/server/modules/routing/readwritesplit/rwsplitsession.cc
@@ -108,6 +108,7 @@ void close_all_connections(SRWBackendList& backends)
 
 void RWSplitSession::close()
 {
+    gwbuf_free(m_query_queue);
     close_all_connections(m_backends);
     m_current_query.reset();