diff --git a/src/main/java/uk/gov/hmcts/darts/audio/component/impl/OutboundFileProcessorImpl.java b/src/main/java/uk/gov/hmcts/darts/audio/component/impl/OutboundFileProcessorImpl.java
index c9d69872b3..a50fd3aeb2 100644
--- a/src/main/java/uk/gov/hmcts/darts/audio/component/impl/OutboundFileProcessorImpl.java
+++ b/src/main/java/uk/gov/hmcts/darts/audio/component/impl/OutboundFileProcessorImpl.java
@@ -103,7 +103,7 @@ public List<AudioFileInfo> processAudioForPlaybacks(Map<MediaEntity, Path> media
             // Used for logging only
             String audioFilenames = null;
             if (log.isDebugEnabled()) {
-                audioFileInfos.stream().map(AudioFileInfo::getMediaFile).collect(Collectors.joining(", "));
+                audioFilenames = audioFileInfos.stream().map(AudioFileInfo::getMediaFile).collect(Collectors.joining(", "));
             }
 
             List<ChannelAudio> concatenationsList = new ArrayList<>();