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-rw-r--r--gtk/gtkboolfilter.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/gtk/gtkboolfilter.c b/gtk/gtkboolfilter.c
index 12c2486d1c..52f917186b 100644
--- a/gtk/gtkboolfilter.c
+++ b/gtk/gtkboolfilter.c
@@ -214,7 +214,7 @@ gtk_bool_filter_new (GtkExpression *expression)
* Gets the expression that the filter uses to evaluate if
* an item should be filtered.
*
- * Returns: (transfer none): a `GtkExpression`
+ * Returns: (transfer none) (nullable): a `GtkExpression`
*/
GtkExpression *
gtk_bool_filter_get_expression (GtkBoolFilter *self)
@@ -227,7 +227,7 @@ gtk_bool_filter_get_expression (GtkBoolFilter *self)
/**
* gtk_bool_filter_set_expression: (attributes org.gtk.Method.set_property=expression)
* @self: a `GtkBoolFilter`
- * @expression: a `GtkExpression`
+ * @expression: (nullable): a `GtkExpression`
*
* Sets the expression that the filter uses to check if items
* should be filtered.