diff --git a/src/add-ons/media/media-add-ons/mixer/MixerCore.cpp b/src/add-ons/media/media-add-ons/mixer/MixerCore.cpp
index 942bf36abe..18791a444a 100644
--- a/src/add-ons/media/media-add-ons/mixer/MixerCore.cpp
+++ b/src/add-ons/media/media-add-ons/mixer/MixerCore.cpp
@@ -44,7 +44,7 @@
 
 
 MixerCore::MixerCore(AudioMixer *node)
- :	fLocker(new BLocker),
+ :	fLocker(new BLocker("mixer core lock")),
 	fInputs(new BList),
 	fOutput(0),
 	fNextInputID(1),
diff --git a/src/add-ons/media/media-add-ons/mixer/MixerSettings.cpp b/src/add-ons/media/media-add-ons/mixer/MixerSettings.cpp
index ad083a01e4..8602ed257c 100644
--- a/src/add-ons/media/media-add-ons/mixer/MixerSettings.cpp
+++ b/src/add-ons/media/media-add-ons/mixer/MixerSettings.cpp
@@ -24,7 +24,7 @@
 #define SETTINGS_VERSION ((int32)0x94251601)
 
 MixerSettings::MixerSettings()
- :	fLocker(new BLocker),
+ :	fLocker(new BLocker("mixer settings lock")),
  	fSettingsFile(0),
 	fSettingsDirty(false),
 	fSettingsLastChange(0),