diff --git a/mission/com/LiveTmTask.cpp b/mission/com/LiveTmTask.cpp
index e9dcc84b..638f2e43 100644
--- a/mission/com/LiveTmTask.cpp
+++ b/mission/com/LiveTmTask.cpp
@@ -137,7 +137,7 @@ ReturnValue_t LiveTmTask::handleGenericTmQueue(MessageQueueIF& queue) {
     return result;
   }
 
-  if (ptmeLocked) {
+  if (!ptmeLocked) {
     result = channel.write(data, size);
   }
   // Try delete in any case, ignore failures (which should not happen), it is more important to