diff --git a/app.go b/app.go
index 0ba9a765..dacf1034 100644
--- a/app.go
+++ b/app.go
@@ -311,18 +311,6 @@ func enableTLS13() {
 	}
 }
 
-// Set user-specified limit of how many fd's we can use
-// https://github.com/AdguardTeam/AdGuardHome/issues/659
-func setRlimit(val uint) {
-	var rlim syscall.Rlimit
-	rlim.Max = uint64(val)
-	rlim.Cur = uint64(val)
-	err := syscall.Setrlimit(syscall.RLIMIT_NOFILE, &rlim)
-	if err != nil {
-		log.Error("Setrlimit() failed: %v", err)
-	}
-}
-
 func cleanup() {
 	log.Info("Stopping AdGuard Home")
 
diff --git a/os_unix.go b/os_unix.go
new file mode 100644
index 00000000..12a918c8
--- /dev/null
+++ b/os_unix.go
@@ -0,0 +1,21 @@
+// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris
+
+package main
+
+import (
+	"syscall"
+
+	"github.com/AdguardTeam/golibs/log"
+)
+
+// Set user-specified limit of how many fd's we can use
+// https://github.com/AdguardTeam/AdGuardHome/issues/659
+func setRlimit(val uint) {
+	var rlim syscall.Rlimit
+	rlim.Max = uint64(val)
+	rlim.Cur = uint64(val)
+	err := syscall.Setrlimit(syscall.RLIMIT_NOFILE, &rlim)
+	if err != nil {
+		log.Error("Setrlimit() failed: %v", err)
+	}
+}
diff --git a/os_windows.go b/os_windows.go
new file mode 100644
index 00000000..1155e04b
--- /dev/null
+++ b/os_windows.go
@@ -0,0 +1,5 @@
+package main
+
+// Set user-specified limit of how many fd's we can use
+func setRlimit(val uint) {
+}