diff --git a/unix/mkerrors.sh b/unix/mkerrors.sh
index 1b667e8..467c03d 100755
--- a/unix/mkerrors.sh
+++ b/unix/mkerrors.sh
@@ -498,6 +498,7 @@
 		$2 !~ "NLA_TYPE_MASK" &&
 		$2 !~ /^RTC_VL_(ACCURACY|BACKUP|DATA)/ &&
 		$2 ~ /^(NETLINK|NLM|NLMSG|NLA|IFA|IFAN|RT|RTC|RTCF|RTN|RTPROT|RTNH|ARPHRD|ETH_P|NETNSA)_/ ||
+		$2 ~ /^FIORDCHK$/ ||
 		$2 ~ /^SIOC/ ||
 		$2 ~ /^TIOC/ ||
 		$2 ~ /^TCGET/ ||
diff --git a/unix/zerrors_solaris_amd64.go b/unix/zerrors_solaris_amd64.go
index c652fdf..5312c36 100644
--- a/unix/zerrors_solaris_amd64.go
+++ b/unix/zerrors_solaris_amd64.go
@@ -296,6 +296,7 @@
 	FF0                           = 0x0
 	FF1                           = 0x8000
 	FFDLY                         = 0x8000
+	FIORDCHK                      = 0x6603
 	FLUSHALL                      = 0x1
 	FLUSHDATA                     = 0x0
 	FLUSHO                        = 0x2000