diff --git a/config.yml.sample b/config.yml.sample
index 2471c29287..ffb47ae4f1 100644
--- a/config.yml.sample
+++ b/config.yml.sample
@@ -60,6 +60,8 @@ service:
   demomode: false
   # Allow changing the logo and other icons based on various occasions throughout the year.
   allowiconchanges: true
+  # Allow using a custom logo via external URL.
+  customlogourl: ''
 
 sentry:
   # If set to true, enables anonymous error tracking of api errors via Sentry. This allows us to gather more 
diff --git a/frontend/index.html b/frontend/index.html
index 6833a9a800..5619b2f996 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -23,8 +23,6 @@
 	// It has to be the full url, including the last /api/v1 part and port.
 	// You can change this if your api is not reachable on the same port as the frontend.
 	window.API_URL = 'http://localhost:3456/api/v1'
-	// Allow using a custom logo via external URL.
-	window.CUSTOM_LOGO_URL = ''
 </script>
 </body>
 </html>
diff --git a/pkg/config/config.go b/pkg/config/config.go
index cd65de264e..096bf51877 100644
--- a/pkg/config/config.go
+++ b/pkg/config/config.go
@@ -63,6 +63,7 @@ const (
 	ServiceEnableUserDeletion    Key = `service.enableuserdeletion`
 	ServiceMaxAvatarSize         Key = `service.maxavatarsize`
 	ServiceAllowIconChanges      Key = `service.allowiconchanges`
+	ServiceCustomLogoURL         Key = `service.customlogourl`
 
 	SentryEnabled         Key = `sentry.enabled`
 	SentryDsn             Key = `sentry.dsn`
diff --git a/pkg/routes/static.go b/pkg/routes/static.go
index 9d0797dfe5..082890a736 100644
--- a/pkg/routes/static.go
+++ b/pkg/routes/static.go
@@ -79,7 +79,7 @@ func serveIndexFile(c echo.Context, assetFs http.FileSystem) (err error) {
 		if config.ServiceAllowIconChanges.GetBool() {
 			data["ALLOW_ICON_CHANGES"] = "true"
 		}
-		data["CUSTOM_LOGO_URL"] = "" // TODO
+		data["CUSTOM_LOGO_URL"] = config.ServiceCustomLogoURL.GetString()
 
 		err = tmpl.Execute(&tplOutput, data)
 		if err != nil {