diff --git a/cura/Settings/ProfilesModel.py b/cura/Settings/ProfilesModel.py
index 7d39d1c220..2ad9813e37 100644
--- a/cura/Settings/ProfilesModel.py
+++ b/cura/Settings/ProfilesModel.py
@@ -56,6 +56,8 @@ class ProfilesModel(InstanceContainersModel):
         machine_manager = Application.getInstance().getMachineManager()
 
         unit = global_container_stack.getBottom().getProperty("layer_height", "unit")
+        if not unit:
+            unit = ""
 
         for item in super()._recomputeItems():
             profile = container_registry.findContainers(id = item["id"])