diff --git a/src/directoryserver.js b/src/directoryserver.js
index 6cac9da5d..ac2da55a5 100644
--- a/src/directoryserver.js
+++ b/src/directoryserver.js
@@ -399,7 +399,7 @@ async function stop() {
 
     debug('stopping server');
 
-    await util.promisify(gServer.close.bind(gServer));
+    await util.promisify(gServer.close.bind(gServer))();
     gServer = null;
 }
 
diff --git a/src/ldapserver.js b/src/ldapserver.js
index 1a4c9b222..8f79b1c57 100644
--- a/src/ldapserver.js
+++ b/src/ldapserver.js
@@ -707,6 +707,6 @@ async function start() {
 async function stop() {
     if (!gServer) return;
 
-    await util.promisify(gServer.close.bind(gServer));
+    await util.promisify(gServer.close.bind(gServer))();
     gServer = null;
 }