diff --git a/ui/images.go b/ui/images.go
index 3491517..a90fef7 100644
--- a/ui/images.go
+++ b/ui/images.go
@@ -22,7 +22,6 @@ import (
 	"mime"
 	"mime/multipart"
 	"net/http"
-	"path/filepath"
 	"strconv"
 	"strings"
 
@@ -70,13 +69,13 @@ func AmServeImage(c echo.Context) error {
 		switch components[2] {
 		case "builtin/":
 			var b []byte
-			b, err = static_images.ReadFile(filepath.Join("static_images", components[3]))
+			b, err = static_images.ReadFile(fmt.Sprintf("static_images/%s", components[3]))
 			if err == nil {
 				return c.Blob(http.StatusOK, mimeTypeFromFilename(components[3]), b)
 			}
 		case "ads/":
 			var b []byte
-			b, err = ad_banners.ReadFile(filepath.Join("adbanners", components[3]))
+			b, err = ad_banners.ReadFile(fmt.Sprintf("adbanners/%s", components[3]))
 			if err == nil {
 				return c.Blob(http.StatusOK, mimeTypeFromFilename(components[3]), b)
 			}
diff --git a/ui/static.go b/ui/static.go
index 7683d5e..a37a9b9 100644
--- a/ui/static.go
+++ b/ui/static.go
@@ -13,11 +13,11 @@ package ui
 import (
 	"bytes"
 	"embed"
+	"fmt"
 	"io"
 	"io/fs"
 	"net/http"
 	"os"
-	"path/filepath"
 	"strings"
 
 	"git.erbosoft.com/amy/amsterdam/config"
@@ -133,7 +133,7 @@ func AmLoadHTMLResource(resourceName string) (string, string, error) {
 		}
 	}
 	if f == nil {
-		f, err = static_resources.Open(filepath.Join("resources", resourceName))
+		f, err = static_resources.Open(fmt.Sprintf("resources/%s", resourceName))
 		if err != nil {
 			return "", "", err
 		}