diff --git a/net/uip/uip_tcpbacklog.c b/net/uip/uip_tcpbacklog.c
index 7e2b6ede4e..0abfe3061b 100644
--- a/net/uip/uip_tcpbacklog.c
+++ b/net/uip/uip_tcpbacklog.c
@@ -196,6 +196,7 @@ int uip_backlogdestroy(FAR struct uip_conn *conn)
 
                blconn->blparent = NULL;
                blconn->backlog  = NULL;
+               blconn->crefs    = 0;
                uip_tcpfree(blconn);
              }
          }
diff --git a/net/uip/uip_tcpinput.c b/net/uip/uip_tcpinput.c
index 5f0430ed26..e09cc62864 100644
--- a/net/uip/uip_tcpinput.c
+++ b/net/uip/uip_tcpinput.c
@@ -173,6 +173,7 @@ void uip_tcpinput(struct uip_driver_s *dev)
                 {
                   /* No, then we have to give the connection back */
 
+                  conn->crefs     = 0;
                   uip_tcpfree(conn);
                   conn = NULL;
                 }