diff --git a/gns3server/compute/virtualbox/__init__.py b/gns3server/compute/virtualbox/__init__.py
index 231149c9..a676bd1a 100644
--- a/gns3server/compute/virtualbox/__init__.py
+++ b/gns3server/compute/virtualbox/__init__.py
@@ -78,7 +78,7 @@ class VirtualBox(BaseManager):
             if not vboxmanage_path:
                 vboxmanage_path = shutil.which("vboxmanage")
 
-        if not os.path.exists(vboxmanage_path):
+        if vboxmanage_path and not os.path.exists(vboxmanage_path):
             log.error("VBoxManage path '{}' doesn't exist".format(vboxmanage_path))
 
         if not vboxmanage_path: