diff --git a/server/modules/routing/cat/cat.cc b/server/modules/routing/cat/cat.cc
index 97d82c843..874df9e62 100644
--- a/server/modules/routing/cat/cat.cc
+++ b/server/modules/routing/cat/cat.cc
@@ -55,7 +55,7 @@ json_t* Cat::diagnostics_json() const
     return NULL;
 }
 
-const uint64_t caps = RCAP_TYPE_STMT_OUTPUT | RCAP_TYPE_STMT_INPUT;
+const uint64_t caps = RCAP_TYPE_PACKET_OUTPUT | RCAP_TYPE_CONTIGUOUS_OUTPUT | RCAP_TYPE_STMT_INPUT;
 
 uint64_t Cat::getCapabilities()
 {
diff --git a/server/modules/routing/cat/catsession.cc b/server/modules/routing/cat/catsession.cc
index eb6c97185..06cc820e1 100644
--- a/server/modules/routing/cat/catsession.cc
+++ b/server/modules/routing/cat/catsession.cc
@@ -104,6 +104,7 @@ void CatSession::clientReply(GWBUF* pPacket, DCB* pDcb)
     if (send)
     {
         // Increment the packet sequence number and send it to the client
+        mxb_assert(modutil_count_packets(pPacket) > 0);
         GWBUF_DATA(pPacket)[3] = m_packet_num++;
         MXS_SESSION_ROUTE_REPLY(pDcb->session, pPacket);
     }