diff --git a/unix/types_freebsd.go b/unix/types_freebsd.go
index 23e3a026a..601096ee5 100644
--- a/unix/types_freebsd.go
+++ b/unix/types_freebsd.go
@@ -356,6 +356,7 @@ const (
 	POLLRDNORM   = C.POLLRDNORM
 	POLLWRBAND   = C.POLLWRBAND
 	POLLWRNORM   = C.POLLWRNORM
+	POLLRDHUP    = C.POLLRDHUP
 )
 
 // Capabilities
diff --git a/unix/ztypes_freebsd_386.go b/unix/ztypes_freebsd_386.go
index 6cbd094a3..51e13eb05 100644
--- a/unix/ztypes_freebsd_386.go
+++ b/unix/ztypes_freebsd_386.go
@@ -625,6 +625,7 @@ const (
 	POLLRDNORM   = 0x40
 	POLLWRBAND   = 0x100
 	POLLWRNORM   = 0x4
+	POLLRDHUP    = 0x4000
 )
 
 type CapRights struct {
diff --git a/unix/ztypes_freebsd_amd64.go b/unix/ztypes_freebsd_amd64.go
index 7c03b6ee7..d002d8ef3 100644
--- a/unix/ztypes_freebsd_amd64.go
+++ b/unix/ztypes_freebsd_amd64.go
@@ -630,6 +630,7 @@ const (
 	POLLRDNORM   = 0x40
 	POLLWRBAND   = 0x100
 	POLLWRNORM   = 0x4
+	POLLRDHUP    = 0x4000
 )
 
 type CapRights struct {
diff --git a/unix/ztypes_freebsd_arm.go b/unix/ztypes_freebsd_arm.go
index 422107ee8..3f863d898 100644
--- a/unix/ztypes_freebsd_arm.go
+++ b/unix/ztypes_freebsd_arm.go
@@ -616,6 +616,7 @@ const (
 	POLLRDNORM   = 0x40
 	POLLWRBAND   = 0x100
 	POLLWRNORM   = 0x4
+	POLLRDHUP    = 0x4000
 )
 
 type CapRights struct {
diff --git a/unix/ztypes_freebsd_arm64.go b/unix/ztypes_freebsd_arm64.go
index 505a12acf..61c729310 100644
--- a/unix/ztypes_freebsd_arm64.go
+++ b/unix/ztypes_freebsd_arm64.go
@@ -610,6 +610,7 @@ const (
 	POLLRDNORM   = 0x40
 	POLLWRBAND   = 0x100
 	POLLWRNORM   = 0x4
+	POLLRDHUP    = 0x4000
 )
 
 type CapRights struct {
diff --git a/unix/ztypes_freebsd_riscv64.go b/unix/ztypes_freebsd_riscv64.go
index cc986c790..b5d17414f 100644
--- a/unix/ztypes_freebsd_riscv64.go
+++ b/unix/ztypes_freebsd_riscv64.go
@@ -612,6 +612,7 @@ const (
 	POLLRDNORM   = 0x40
 	POLLWRBAND   = 0x100
 	POLLWRNORM   = 0x4
+	POLLRDHUP    = 0x4000
 )
 
 type CapRights struct {