diff --git a/unix/types_illumos.go b/unix/types_illumos.go
index 770f8aa3..d47ab635 100644
--- a/unix/types_illumos.go
+++ b/unix/types_illumos.go
@@ -33,6 +33,8 @@ const (
 	I_STR     = C.I_STR
 	I_POP     = C.I_POP
 	I_PUSH    = C.I_PUSH
+	I_LINK    = C.I_LINK
+	I_UNLINK  = C.I_UNLINK
 	I_PLINK   = C.I_PLINK
 	I_PUNLINK = C.I_PUNLINK
 
diff --git a/unix/ztypes_illumos_amd64.go b/unix/ztypes_illumos_amd64.go
index 236f37ef..4c485261 100644
--- a/unix/ztypes_illumos_amd64.go
+++ b/unix/ztypes_illumos_amd64.go
@@ -13,6 +13,8 @@ const (
 	I_STR     = 0x5308
 	I_POP     = 0x5303
 	I_PUSH    = 0x5302
+	I_LINK    = 0x530c
+	I_UNLINK  = 0x530d
 	I_PLINK   = 0x5316
 	I_PUNLINK = 0x5317