diff --git a/grc/flow_control/gsm_burst_type_filter.xml b/grc/flow_control/gsm_burst_type_filter.xml
index a615961..d7d86f4 100644
--- a/grc/flow_control/gsm_burst_type_filter.xml
+++ b/grc/flow_control/gsm_burst_type_filter.xml
@@ -13,13 +13,13 @@
   </param>
 
   <sink>
-    <name>in</name>
+    <name>bursts_in</name>
     <type>message</type>
     <optional>1</optional>
   </sink>
 
   <source>
-    <name>out</name>
+    <name>bursts_out</name>
     <type>message</type>
     <optional>1</optional>
   </source>