diff --git a/src/segment_os.go b/src/segment_os.go
index fcffea97..d60c96ad 100644
--- a/src/segment_os.go
+++ b/src/segment_os.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"strings"
 )
 
 type osInfo struct {
@@ -84,7 +85,7 @@ func (n *osInfo) string() string {
 			n.os = p
 			return n.getDistroName(p, "")
 		}
-		n.os = wsl
+		n.os = strings.ToLower(wsl)
 		return fmt.Sprintf("%s%s%s",
 			n.props.getString(WSL, "WSL"),
 			n.props.getString(WSLSeparator, " - "),
diff --git a/src/template.go b/src/template.go
index cc24e81a..e435d621 100644
--- a/src/template.go
+++ b/src/template.go
@@ -62,7 +62,7 @@ func (c *Context) init(t *textTemplate) {
 		wsl := t.Env.getenv("WSL_DISTRO_NAME")
 		goos = t.Env.getPlatform()
 		if len(wsl) != 0 {
-			goos = wsl
+			goos = strings.ToLower(wsl)
 		}
 	}
 	c.OS = goos