diff --git a/setup.py b/setup.py
index 9dd0c30..a37f8c4 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,7 @@
 
 setup(
     name='sastadev',
-    version='0.1.4',
+    version='0.1.5',
     description='Linguistic functions for SASTA tool',
     long_description=long_description,
     long_description_content_type='text/markdown',
diff --git a/src/sastadev/xenx.py b/src/sastadev/xenx.py
index c014ed5..dda06bd 100644
--- a/src/sastadev/xenx.py
+++ b/src/sastadev/xenx.py
@@ -55,6 +55,6 @@ def xenx(tree: SynTree) -> List[SynTree]:
                     include = include and (childptcat == firstptcat) and childptcat not in clausecats
             #print('include=', include)
         #print('final: include=', include)
-        if include:
+        if include and crdresult is not None:
             results.append(crdresult)
     return results