diff --git a/cmd/soju/main.go b/cmd/soju/main.go
index 3771be0..5e784c9 100644
--- a/cmd/soju/main.go
+++ b/cmd/soju/main.go
@@ -40,18 +40,6 @@ func (v *stringSliceFlag) Set(s string) error {
 	return nil
 }
 
-func bumpOpenedFileLimit() error {
-	var rlimit syscall.Rlimit
-	if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rlimit); err != nil {
-		return fmt.Errorf("failed to get RLIMIT_NOFILE: %v", err)
-	}
-	rlimit.Cur = rlimit.Max
-	if err := syscall.Setrlimit(syscall.RLIMIT_NOFILE, &rlimit); err != nil {
-		return fmt.Errorf("failed to set RLIMIT_NOFILE: %v", err)
-	}
-	return nil
-}
-
 var (
 	configPath string
 	debug      bool
diff --git a/cmd/soju/rlimit.go b/cmd/soju/rlimit.go
new file mode 100644
index 0000000..a0c51c9
--- /dev/null
+++ b/cmd/soju/rlimit.go
@@ -0,0 +1,21 @@
+//go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris
+// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris
+
+package main
+
+import (
+	"fmt"
+	"syscall"
+)
+
+func bumpOpenedFileLimit() error {
+	var rlimit syscall.Rlimit
+	if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rlimit); err != nil {
+		return fmt.Errorf("failed to get RLIMIT_NOFILE: %v", err)
+	}
+	rlimit.Cur = rlimit.Max
+	if err := syscall.Setrlimit(syscall.RLIMIT_NOFILE, &rlimit); err != nil {
+		return fmt.Errorf("failed to set RLIMIT_NOFILE: %v", err)
+	}
+	return nil
+}
diff --git a/cmd/soju/rlimit_stub.go b/cmd/soju/rlimit_stub.go
new file mode 100644
index 0000000..c409b1a
--- /dev/null
+++ b/cmd/soju/rlimit_stub.go
@@ -0,0 +1,8 @@
+//go:build !aix && !darwin && !dragonfly && !freebsd && !linux && !netbsd && !openbsd && !solaris
+// +build !aix,!darwin,!dragonfly,!freebsd,!linux,!netbsd,!openbsd,!solaris
+
+package main
+
+func bumpOpenedFileLimit() error {
+	return nil
+}