diff --git a/src/pymod/distutils_src/pya/__init__.py b/src/pymod/distutils_src/pya/__init__.py
index a822c6177..83207e91d 100644
--- a/src/pymod/distutils_src/pya/__init__.py
+++ b/src/pymod/distutils_src/pya/__init__.py
@@ -4,6 +4,8 @@ from klayout.pya import __all__
 from klayout.pya import *
 
 from klayout.db.pcell_declaration_helper import *
+from klayout.db.pcell_declaration_helper import __all__ as _all_added1
+__all__ += _all_added1
 
 # establish the PCellDeclarationHelper using the mixin provided by _pcell_declaration_helper
 class PCellDeclarationHelper(_PCellDeclarationHelperMixin, PCellDeclaration):
@@ -19,3 +21,5 @@ for k in dir(PCellParameterDeclaration):
   if k.startswith("Type"):
     setattr(PCellDeclarationHelper, k, getattr(PCellParameterDeclaration, k))
 
+__all__ += [ "PCellDeclarationHelper" ]
+