diff --git a/capnp/lib/capnp.pyx b/capnp/lib/capnp.pyx
index a3ec1dd..5cbae46 100644
--- a/capnp/lib/capnp.pyx
+++ b/capnp/lib/capnp.pyx
@@ -3239,7 +3239,7 @@ cdef class SchemaParser:
         _load(fileSchema, module)
 
         abs_path = _os.path.abspath(file_name)
-        module.__path__ = _os.path.dirname(abs_path)
+        module.__path__ = [_os.path.dirname(abs_path)]
         module.__file__ = abs_path
         module.schema = fileSchema