diff --git a/src/kits/media/MediaExtractor.cpp b/src/kits/media/MediaExtractor.cpp
index a2a394268a..d03ba2212e 100644
--- a/src/kits/media/MediaExtractor.cpp
+++ b/src/kits/media/MediaExtractor.cpp
@@ -235,7 +235,7 @@ MediaExtractor::GetNextChunk(int32 stream,
 		return fStreamInfo[stream].status;
 
 #if DISABLE_CHUNK_CACHE > 0
-	static BLocker locker;
+	static BLocker locker("media extractor next chunk");
 	BAutolock lock(locker);
 	return fReader->GetNextChunk(fStreamInfo[stream].cookie, chunkBuffer,
 		chunkSize, mediaHeader);
diff --git a/src/kits/media/MediaTheme.cpp b/src/kits/media/MediaTheme.cpp
index d4a361c055..bf18b6a92d 100644
--- a/src/kits/media/MediaTheme.cpp
+++ b/src/kits/media/MediaTheme.cpp
@@ -19,7 +19,7 @@
 #include <string.h>
 
 
-static BLocker sLock;
+static BLocker sLock("media theme lock");
 
 BMediaTheme* BMediaTheme::sDefaultTheme;
 
diff --git a/src/kits/media/OldAudioModule.cpp b/src/kits/media/OldAudioModule.cpp
index 07db351b9c..5f9e7a3f4a 100644
--- a/src/kits/media/OldAudioModule.cpp
+++ b/src/kits/media/OldAudioModule.cpp
@@ -364,6 +364,8 @@ BAudioFileStream::Channel()
 
 BADCSource::BADCSource(BMediaChannel *channel,
 					   mk_time start)
+	:
+	fEventLock("BADCSource lock")
 {
 	UNIMPLEMENTED();
 }