diff --git a/app/src/main/java/com/geeksville/mesh/service/MeshService.kt b/app/src/main/java/com/geeksville/mesh/service/MeshService.kt
index 152f78d2e..d6841c391 100644
--- a/app/src/main/java/com/geeksville/mesh/service/MeshService.kt
+++ b/app/src/main/java/com/geeksville/mesh/service/MeshService.kt
@@ -55,7 +55,7 @@ class MeshService : Service(), Logging {
         /* @Deprecated(message = "Does not filter by port number.  For legacy reasons only broadcast for UNKNOWN_APP, switch to ACTION_RECEIVED")
         const val ACTION_RECEIVED_DATA = "$prefix.RECEIVED_DATA" */
 
-        fun actionReceived(portNum: String) = "$prefix.RECEIVED.$portNum"
+        private fun actionReceived(portNum: String) = "$prefix.RECEIVED.$portNum"
 
         /// generate a RECEIVED action filter string that includes either the portnumber as an int, or preferably a symbolic name from portnums.proto
         fun actionReceived(portNum: Int): String {