diff --git a/server/modules/filter/dbfwfilter/dbfwfilter.c b/server/modules/filter/dbfwfilter/dbfwfilter.c
index 9e4ce22b8..13da00544 100644
--- a/server/modules/filter/dbfwfilter/dbfwfilter.c
+++ b/server/modules/filter/dbfwfilter/dbfwfilter.c
@@ -2193,6 +2193,13 @@ routeQuery(FILTER *instance, void *session, GWBUF *queue)
     int rval = 0;
     ss_dassert(dcb && dcb->session);
 
+    uint32_t type = 0;
+
+    if (modutil_is_SQL(queue) || modutil_is_SQL_prepare(queue))
+    {
+        type = qc_get_type(queue);
+    }
+
     if (modutil_is_SQL(queue) && modutil_count_statements(queue) > 1)
     {
         GWBUF* err = gen_dummy_error(my_session, "This filter does not support "
@@ -2202,6 +2209,17 @@ routeQuery(FILTER *instance, void *session, GWBUF *queue)
         my_session->errmsg = NULL;
         rval = dcb->func.write(dcb, err);
     }
+    else if (QUERY_IS_TYPE(type, QUERY_TYPE_PREPARE_STMT) ||
+             QUERY_IS_TYPE(type, QUERY_TYPE_PREPARE_NAMED_STMT) ||
+             modutil_is_SQL_prepare(queue))
+    {
+        GWBUF* err = gen_dummy_error(my_session, "This filter does not support "
+                                     "prepared statements.");
+        gwbuf_free(queue);
+        free(my_session->errmsg);
+        my_session->errmsg = NULL;
+        rval = dcb->func.write(dcb, err);
+    }
     else
     {
         USER *user = find_user_data(my_instance->htable, dcb->user, dcb->remote);