diff --git a/src/ifcopenshell-python/ifcopenshell/file.py b/src/ifcopenshell-python/ifcopenshell/file.py
index e57cf58cf4..504560bff6 100644
--- a/src/ifcopenshell-python/ifcopenshell/file.py
+++ b/src/ifcopenshell-python/ifcopenshell/file.py
@@ -230,7 +230,7 @@ mvd_grammar = r'''
     
     set_name: /[A-Za-z0-9_]+/
     
-    value: /[A-Za-z0-9 _-]+/
+    value: /[A-Za-z0-9 _\.-]+/
     
     comment_text: /[^\[\]]+/  // Free text inside COMMENT brackets