diff --git a/server/modules/routing/readwritesplit/rwsplit_session_cmd.cc b/server/modules/routing/readwritesplit/rwsplit_session_cmd.cc
index 63d910c04..76119b975 100644
--- a/server/modules/routing/readwritesplit/rwsplit_session_cmd.cc
+++ b/server/modules/routing/readwritesplit/rwsplit_session_cmd.cc
@@ -40,7 +40,7 @@ void process_sescmd_response(RWSplitSession* rses, SRWBackend& backend,
             uint64_t id = backend->complete_session_command();
             MXS_PS_RESPONSE resp = {};
 
-            if (command == MXS_COM_STMT_PREPARE)
+            if (command == MXS_COM_STMT_PREPARE && cmd != MYSQL_REPLY_ERR)
             {
                 // This should never fail or the backend protocol is broken
                 ss_debug(bool b = )mxs_mysql_extract_ps_response(*ppPacket, &resp);