diff --git a/gns3server/schemas/project.py b/gns3server/schemas/project.py
index 9ebcfba0..7bd8b723 100644
--- a/gns3server/schemas/project.py
+++ b/gns3server/schemas/project.py
@@ -23,7 +23,7 @@ PROJECT_CREATE_SCHEMA = {
     "properties": {
         "path": {
             "description": "Project directory",
-            "type": "string",
+            "type": ["string", "null"],
             "minLength": 1
         },
         "project_id": {