diff --git a/gns3server/handlers/api/project_handler.py b/gns3server/handlers/api/project_handler.py
index 000724d8..b56e703f 100644
--- a/gns3server/handlers/api/project_handler.py
+++ b/gns3server/handlers/api/project_handler.py
@@ -405,7 +405,7 @@ class ProjectHandler:
                     if not packet:
                         break
                     temp.write(packet)
-                project.import_zip(temp, gns3vm=bool(request.GET.get("gns3vm", "1")))
+                project.import_zip(temp, gns3vm=bool(int(request.GET.get("gns3vm", "1"))))
         except OSError as e:
             raise aiohttp.web.HTTPInternalServerError(text="Could not import the project: {}".format(e))