diff --git a/net/mptcp/options.c b/net/mptcp/options.c
index 3b4a22846055..64aa7a516a23 100644
--- a/net/mptcp/options.c
+++ b/net/mptcp/options.c
@@ -259,7 +259,7 @@ static void mptcp_parse_option(const struct sk_buff *skb,
 			pr_debug("data_seq=%llu subflow_seq=%u data_len=%u csum=%d:%u\n",
 				 mp_opt->data_seq, mp_opt->subflow_seq,
 				 mp_opt->data_len, !!(mp_opt->suboptions & OPTION_MPTCP_CSUMREQD),
-				 mp_opt->csum);
+				 (mp_opt->suboptions & OPTION_MPTCP_CSUMREQD) ? mp_opt->csum : 0);
 		}
 
 		break;