diff --git a/grc/gsm_block_tree.xml b/grc/gsm_block_tree.xml
index e75197c..2503710 100644
--- a/grc/gsm_block_tree.xml
+++ b/grc/gsm_block_tree.xml
@@ -42,6 +42,7 @@
       <block>gsm_bursts_printer</block>
       <block>gsm_burst_sink</block>
       <block>gsm_burst_source</block>
+      <block>gsm_burst_sink_qa</block>
       <block>gsm_burst_source_qa</block>
       <block>gsm_extract_system_info</block>
       <block>gsm_extract_immediate_assignment</block>