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-rw-r--r--gr-blocks/grc/blocks_mute_xx.xml5
1 files changed, 5 insertions, 0 deletions
diff --git a/gr-blocks/grc/blocks_mute_xx.xml b/gr-blocks/grc/blocks_mute_xx.xml
index 7023d32674..74c22ec83a 100644
--- a/gr-blocks/grc/blocks_mute_xx.xml
+++ b/gr-blocks/grc/blocks_mute_xx.xml
@@ -54,6 +54,11 @@
<name>in</name>
<type>$type</type>
</sink>
+ <sink>
+ <name>set_mute</name>
+ <type>message</type>
+ <optional>1</optional>
+ </sink>
<source>
<name>out</name>
<type>$type</type>