diff --git a/lib/private/URLGenerator.php b/lib/private/URLGenerator.php
index b432b0b69cad4..018361e0062e3 100644
--- a/lib/private/URLGenerator.php
+++ b/lib/private/URLGenerator.php
@@ -267,6 +267,9 @@ public function linkToDocs(string $key): string {
 	 * @return string base url of the current request
 	 */
 	public function getBaseUrl(): string {
-		return $this->request->getServerProtocol() . '://' . $this->request->getServerHost() . \OC::$WEBROOT;
+		if ($this->baseUrl === null) {
+			$this->baseUrl = $this->request->getServerProtocol() . '://' . $this->request->getServerHost() . \OC::$WEBROOT;
+		}
+		return $this->baseUrl;
 	}
 }