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-rw-r--r--grc/blocks/gr_file_sink.xml1
1 files changed, 1 insertions, 0 deletions
diff --git a/grc/blocks/gr_file_sink.xml b/grc/blocks/gr_file_sink.xml
index 0081c93f8..d0a693900 100644
--- a/grc/blocks/gr_file_sink.xml
+++ b/grc/blocks/gr_file_sink.xml
@@ -11,6 +11,7 @@
<make>gr.file_sink($type.size*$vlen, $file)
self.$(id).set_unbuffered($unbuffered)</make>
<callback>set_unbuffered($unbuffered)</callback>
+ <callback>open($file)</callback>
<param>
<name>File</name>
<key>file</key>