diff --git a/net-mgmt/net-snmp/files/patch-Makefile.in b/net-mgmt/net-snmp/files/patch-Makefile.in
--- a/net-mgmt/net-snmp/files/patch-Makefile.in
+++ b/net-mgmt/net-snmp/files/patch-Makefile.in
@@ -5,7 +5,7 @@
  	freebsd2.h freebsd3.h freebsd4.h freebsd5.h freebsd6.h \
  	freebsd7.h freebsd8.h freebsd9.h freebsd10.h freebsd11.h \
 -	freebsd12.h freebsd13.h freebsd14.h freebsd.h \
-+	freebsd12.h freebsd13.h freebsd14.h freebsd15.h freebsd.h \
++	freebsd12.h freebsd13.h freebsd14.h freebsd15.h freebsd16.h freebsd.h \
  	generic.h \
  	hpux.h irix.h kfreebsd.h linux.h mingw32.h mingw32msvc.h mips.h \
  	netbsd.h nto-qnx6.h osf5.h \
diff --git a/net-mgmt/net-snmp/files/patch-include_net-snmp_system_freebsd16.h b/net-mgmt/net-snmp/files/patch-include_net-snmp_system_freebsd16.h
new file mode 100644
--- /dev/null
+++ b/net-mgmt/net-snmp/files/patch-include_net-snmp_system_freebsd16.h
@@ -0,0 +1,6 @@
+--- /dev/null	2025-09-10 01:07:21.909920000 +0200
++++ include/net-snmp/system/freebsd16.h	2025-09-10 01:07:12.250409000 +0200
+@@ -0,0 +1,3 @@
++/* freebsd16 is a superset of freebsd15 for now */
++#include "freebsd15.h"
++#define freebsd15 freebsd15
diff --git a/net-mgmt/net-snmp/pkg-plist b/net-mgmt/net-snmp/pkg-plist
--- a/net-mgmt/net-snmp/pkg-plist
+++ b/net-mgmt/net-snmp/pkg-plist
@@ -188,6 +188,7 @@
 include/net-snmp/system/freebsd13.h
 include/net-snmp/system/freebsd14.h
 include/net-snmp/system/freebsd15.h
+include/net-snmp/system/freebsd16.h
 include/net-snmp/system/freebsd2.h
 include/net-snmp/system/freebsd3.h
 include/net-snmp/system/freebsd4.h