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-rw-r--r--grc/blocks/gr_quadrature_demod_cf.xml1
1 files changed, 1 insertions, 0 deletions
diff --git a/grc/blocks/gr_quadrature_demod_cf.xml b/grc/blocks/gr_quadrature_demod_cf.xml
index a0e630c7e..fad0b3879 100644
--- a/grc/blocks/gr_quadrature_demod_cf.xml
+++ b/grc/blocks/gr_quadrature_demod_cf.xml
@@ -9,6 +9,7 @@
<key>gr_quadrature_demod_cf</key>
<import>from gnuradio import gr</import>
<make>gr.quadrature_demod_cf($gain)</make>
+ <callback>set_gain($gain)</callback>
<param>
<name>Gain</name>
<key>gain</key>