diff --git a/src/caosadvancedtools/cfood.py b/src/caosadvancedtools/cfood.py
index 3058e58f0557e0f55030e3d5b214bb7345749415..bd5cb5108f59f86c3e0758d3f14e1b18bf812797 100644
--- a/src/caosadvancedtools/cfood.py
+++ b/src/caosadvancedtools/cfood.py
@@ -299,7 +299,7 @@ def assure_has_parent(entity, parent, to_be_updated=None, verbosity=INFO):
 
 
 def assure_has_property(entity, name, value, to_be_updated=None,
-                        verbosity=INFO):
+                        verbosity=INFO, datatype=None):
     """
     Checks whether `entity` has a property `name` with the value `value`.
 
@@ -332,7 +332,11 @@ def assure_has_property(entity, name, value, to_be_updated=None,
             name,
             value, entity.id))
         print("/"*60)
-    entity.add_property(name=name, value=value)
+
+    if datatype is None:
+        entity.add_property(name=name, value=value)
+    else:
+        entity.add_property(name=name, value=value, datatype=datatype)
 
     if to_be_updated is None:
         get_ids_for_entities_with_names([entity])