diff --git a/wgengine/magicsock/dontfrag_darwin.go b/wgengine/magicsock/peermtu_darwin.go
similarity index 100%
rename from wgengine/magicsock/dontfrag_darwin.go
rename to wgengine/magicsock/peermtu_darwin.go
diff --git a/wgengine/magicsock/dontfrag_linux.go b/wgengine/magicsock/peermtu_linux.go
similarity index 100%
rename from wgengine/magicsock/dontfrag_linux.go
rename to wgengine/magicsock/peermtu_linux.go
diff --git a/wgengine/magicsock/dontfrag_default.go b/wgengine/magicsock/peermtu_stubs.go
similarity index 100%
rename from wgengine/magicsock/dontfrag_default.go
rename to wgengine/magicsock/peermtu_stubs.go