diff --git a/ext/sctp/usrsctp/usrsctplib/netinet/sctp_constants.h b/ext/sctp/usrsctp/usrsctplib/netinet/sctp_constants.h
index 5e2c5d1603..66b3fa834d 100644
--- a/ext/sctp/usrsctp/usrsctplib/netinet/sctp_constants.h
+++ b/ext/sctp/usrsctp/usrsctplib/netinet/sctp_constants.h
@@ -753,7 +753,7 @@ extern void getwintimeofday(struct timeval *tv);
 #define SCTP_DEFAULT_SPLIT_POINT_MIN 2904
 
 /* Maximum length of diagnostic information in error causes */
-#define SCTP_DIAG_INFO_LEN 128
+#define SCTP_DIAG_INFO_LEN 256
 
 /* ABORT CODES and other tell-tale location
  * codes are generated by adding the below