diff --git a/gns3server/compute/qemu/qemu_vm.py b/gns3server/compute/qemu/qemu_vm.py
index b612fa63..ef4e56eb 100644
--- a/gns3server/compute/qemu/qemu_vm.py
+++ b/gns3server/compute/qemu/qemu_vm.py
@@ -1890,7 +1890,7 @@ class QemuVM(BaseNode):
         additional_options = additional_options.replace("%project-id%", self.project.id)
         additional_options = additional_options.replace("%project-path%", '"' + self.project.path.replace('"', '\\"') + '"')
         if self._console:
-            additional_options = additional_options.replace("%console-port%", self._console)
+            additional_options = additional_options.replace("%console-port%", str(self._console))
         command = [self.qemu_path]
         command.extend(["-name", self._name])
         command.extend(["-m", "{}M".format(self._ram)])