diff --git a/PROMS/ReferencedObjects/Exe/RefObj/ROEditor/RODefFrm.cs b/PROMS/ReferencedObjects/Exe/RefObj/ROEditor/RODefFrm.cs
index 9efa06a8..f2dc6f34 100644
--- a/PROMS/ReferencedObjects/Exe/RefObj/ROEditor/RODefFrm.cs
+++ b/PROMS/ReferencedObjects/Exe/RefObj/ROEditor/RODefFrm.cs
@@ -746,6 +746,7 @@ namespace ROEditor
 									break;
 								}
 							}
+							if (inusename == "u") found = true; //to handle unit designation
 							if (found == false)syntax(inusename+" invalid field name",strt,where);
 							// used to have procini def stuff here.
 							start=where+1;