diff --git a/sys/netinet/sctp_constants.h b/sys/netinet/sctp_constants.h
index e779051d15ee..dca34cc59ffa 100644
--- a/sys/netinet/sctp_constants.h
+++ b/sys/netinet/sctp_constants.h
@@ -758,7 +758,7 @@ __FBSDID("$FreeBSD$");
 #define SCTP_DEFAULT_SPLIT_POINT_MIN 2904
 
 /* Maximum length of diagnostic information in error causes */
-#define SCTP_DIAG_INFO_LEN 64
+#define SCTP_DIAG_INFO_LEN 128
 
 /* ABORT CODES and other tell-tale location
  * codes are generated by adding the below