diff --git a/net-mgmt/net-snmp/files/patch-agent_mibgroup_mibII_tcpTable.c b/net-mgmt/net-snmp/files/patch-agent_mibgroup_mibII_tcpTable.c
new file mode 100644
--- /dev/null
+++ b/net-mgmt/net-snmp/files/patch-agent_mibgroup_mibII_tcpTable.c
@@ -0,0 +1,33 @@
+--- agent/mibgroup/mibII/tcpTable.c.orig       2023-08-15 20:32:01 UTC
++++ agent/mibgroup/mibII/tcpTable.c
+@@ -50,6 +50,14 @@
+ #undef _KERNEL
+ #endif
+
++/* FreeBSD: need version macro and TCP/PCB snapshot structs */
++#if defined(__FreeBSD__)
++#include <sys/param.h>          /* __FreeBSD_version */
++#include <sys/socketvar.h>      /* needed so tcp_var.h declares struct xtcpcb */
++#include <netinet/in_pcb.h>     /* struct xinpcb, inp_* */
++#include <netinet/tcp_var.h>    /* struct xtcpcb, t_state */
++#endif
++
+ #if defined(cygwin) || defined(mingw32)
+ #include <winerror.h>
+ #endif
+@@ -954,7 +962,14 @@ tcpTable_load(netsnmp_cache *cache, void *vmagic)
+ #if defined(freebsd4) || defined(darwin)
+ #define NS_ELEM struct xtcpcb
+ #else
+-#define NS_ELEM struct xinpcb
++#if defined(__FreeBSD__) && (__FreeBSD_version >= 1500064)
++/*
++ * FreeBSD 15+: pcblist entries are xtcpcb (contains xt_inp and t_state)
++ */
++#define NS_ELEM struct xtcpcb
++#else
++#define NS_ELEM struct xinpcb
++#endif
+ #endif
+
+ int