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-rw-r--r--giscanner/girwriter.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/giscanner/girwriter.py b/giscanner/girwriter.py
index 49545e62..3bea2a1c 100644
--- a/giscanner/girwriter.py
+++ b/giscanner/girwriter.py
@@ -215,6 +215,8 @@ class GIRWriter(XMLWriter):
attrs.append(('transfer-ownership', return_.transfer))
if return_.skip:
attrs.append(('skip', '1'))
+ if return_.nullable:
+ attrs.append(('nullable', '1'))
with self.tagcontext('return-value', attrs):
self._write_generic(return_)
self._write_type(return_.type, parent=parent)