diff --git a/grc/transmitter/gsm_preprocess_tx_burst.block.yml b/grc/transmitter/gsm_preprocess_tx_burst.block.yml
new file mode 100644
index 0000000..09cc030
--- /dev/null
+++ b/grc/transmitter/gsm_preprocess_tx_burst.block.yml
@@ -0,0 +1,20 @@
+# auto-generated by grc.converter
+
+id: gsm_preprocess_tx_burst
+label: Preprocess Tx burst
+
+inputs:
+-   domain: message
+    id: bursts_in
+    optional: true
+
+outputs:
+-   domain: message
+    id: bursts_out
+    optional: true
+
+templates:
+    imports: import grgsm
+    make: grgsm.preprocess_tx_burst()
+
+file_format: 1