diff --git a/unix/types_freebsd.go b/unix/types_freebsd.go
index 23e3a02..601096e 100644
--- a/unix/types_freebsd.go
+++ b/unix/types_freebsd.go
@@ -356,6 +356,7 @@
 	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 6cbd094..51e13eb 100644
--- a/unix/ztypes_freebsd_386.go
+++ b/unix/ztypes_freebsd_386.go
@@ -625,6 +625,7 @@
 	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 7c03b6e..d002d8e 100644
--- a/unix/ztypes_freebsd_amd64.go
+++ b/unix/ztypes_freebsd_amd64.go
@@ -630,6 +630,7 @@
 	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 422107e..3f863d8 100644
--- a/unix/ztypes_freebsd_arm.go
+++ b/unix/ztypes_freebsd_arm.go
@@ -616,6 +616,7 @@
 	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 505a12a..61c7293 100644
--- a/unix/ztypes_freebsd_arm64.go
+++ b/unix/ztypes_freebsd_arm64.go
@@ -610,6 +610,7 @@
 	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 cc986c7..b5d1741 100644
--- a/unix/ztypes_freebsd_riscv64.go
+++ b/unix/ztypes_freebsd_riscv64.go
@@ -612,6 +612,7 @@
 	POLLRDNORM   = 0x40
 	POLLWRBAND   = 0x100
 	POLLWRNORM   = 0x4
+	POLLRDHUP    = 0x4000
 )
 
 type CapRights struct {