diff --git a/odxtools/standardlengthtype.py b/odxtools/standardlengthtype.py
index beb42e3c..5f39b08c 100644
--- a/odxtools/standardlengthtype.py
+++ b/odxtools/standardlengthtype.py
@@ -34,7 +34,9 @@ def __apply_mask(self, internal_value: AtomicOdxType) -> AtomicOdxType:
         if self.bit_mask is None:
             return internal_value
         if self.is_condensed_raw is True:
-            raise NotImplementedError("Serialization of condensed bit mask is not supported")
+            odxraise("Serialization of condensed bit mask is not supported",
+                     NotImplementedError)
+            return
         if isinstance(internal_value, int):
             return internal_value & self.bit_mask
         if isinstance(internal_value, bytes):