diff --git a/segment-readonly.go b/segment-readonly.go
index 53d9c33a..224be181 100644
--- a/segment-readonly.go
+++ b/segment-readonly.go
@@ -1,9 +1,12 @@
+// +build !windows
+
 package main
 
 import (
 	"fmt"
-	"golang.org/x/sys/unix"
 	"os"
+
+	"golang.org/x/sys/unix"
 )
 
 func segmentPerms(p *powerline) {
diff --git a/segment-readonly_windows.go b/segment-readonly_windows.go
new file mode 100644
index 00000000..cdf719d4
--- /dev/null
+++ b/segment-readonly_windows.go
@@ -0,0 +1,26 @@
+// +build windows
+
+package main
+
+import (
+	"fmt"
+	"os"
+)
+
+func segmentPerms(p *powerline) {
+	cwd := p.cwd
+	if cwd == "" {
+		cwd, _ = os.LookupEnv("PWD")
+	}
+
+	const W_USR = 0002
+	// Check user's permissions on directory in a portable but probably slower way
+	fileInfo, _ := os.Stat(cwd)
+	if fileInfo.Mode()&W_USR != W_USR {
+		p.appendSegment("perms", segment{
+			content:    fmt.Sprintf(" %s ", p.symbolTemplates.Lock),
+			foreground: p.theme.ReadonlyFg,
+			background: p.theme.ReadonlyBg,
+		})
+	}
+}