diff --git a/third_party/go/patches/k8s-reserve-metropolis-ports.patch b/third_party/go/patches/k8s-reserve-metropolis-ports.patch
new file mode 100644
index 0000000..7586b10
--- /dev/null
+++ b/third_party/go/patches/k8s-reserve-metropolis-ports.patch
@@ -0,0 +1,24 @@
+diff --git a/pkg/registry/core/service/portallocator/allocator.go b/pkg/registry/core/service/portallocator/allocator.go
+--- a/pkg/registry/core/service/portallocator/allocator.go	(revision f66044f4361b9f1f96f0053dd46cb7dce5e990a8)
++++ b/pkg/registry/core/service/portallocator/allocator.go	(revision f42349f2a3ed203fc06462b9f28e90c0b857cb42)
+@@ -25,6 +25,7 @@
+ 	"k8s.io/kubernetes/pkg/registry/core/service/allocator"
+
+ 	"k8s.io/klog/v2"
++	"source.monogon.dev/metropolis/node"
+ )
+
+ // Interface manages the allocation of ports out of a range. Interface
+@@ -70,6 +71,12 @@
+ 	}
+ 	var err error
+ 	a.alloc, err = allocatorFactory(max, rangeSpec)
++
++	for _, p := range node.SystemPorts {
++		// We ignore errors as these could only happen if the port we try to
++		// allocate is out of range, which we dont really care about.
++		_, _ = a.alloc.Allocate(int(p))
++	}
+ 	return a, err
+ }
+