diff --git a/core/net/rpl/rpl-ext-header.c b/core/net/rpl/rpl-ext-header.c
index d287bc4e6..3319e6d29 100644
--- a/core/net/rpl/rpl-ext-header.c
+++ b/core/net/rpl/rpl-ext-header.c
@@ -138,10 +138,9 @@ rpl_verify_header(int uip_ext_opt_offset)
 	   sender_closer);
     if(UIP_EXT_HDR_OPT_RPL_BUF->flags & RPL_HDR_OPT_RANK_ERR) {
       PRINTF("RPL: Rank error signalled in RPL option!\n");
-      /* We should try to repair it, not implemented for the moment */
+      /* Packet must be dropped and dio trickle timer reset, see RFC6550 - 11.2.2.2 */
       rpl_reset_dio_timer(instance);
-      /* Forward the packet anyway. */
-      return 0;
+      return 1;
     }
     PRINTF("RPL: Single error tolerated\n");
     UIP_EXT_HDR_OPT_RPL_BUF->flags |= RPL_HDR_OPT_RANK_ERR;