diff --git a/src/kits/midi2/MidiProducer.cpp b/src/kits/midi2/MidiProducer.cpp
index ff1c1d34e4..383e77cad7 100644
--- a/src/kits/midi2/MidiProducer.cpp
+++ b/src/kits/midi2/MidiProducer.cpp
@@ -93,7 +93,7 @@ BMidiProducer::BMidiProducer(const char* name)
 {
 	isConsumer = false;
 	connections = new BList;
-	locker = new BLocker();
+	locker = new BLocker("MidiProducerLock");
 }
 
 //------------------------------------------------------------------------------
diff --git a/src/kits/midi2/MidiRosterLooper.cpp b/src/kits/midi2/MidiRosterLooper.cpp
index 7d9f64c530..7f4d479891 100644
--- a/src/kits/midi2/MidiRosterLooper.cpp
+++ b/src/kits/midi2/MidiRosterLooper.cpp
@@ -12,6 +12,7 @@
 //------------------------------------------------------------------------------
 
 BMidiRosterLooper::BMidiRosterLooper()
+	: BLooper("MidiRosterLooper")
 {
 	initLock = -1;
 	roster = NULL;
@@ -68,7 +69,7 @@ bool BMidiRosterLooper::Init(BMidiRoster* roster_)
 	// "app registered" message in our MessageReceived() hook,
 	// we release the semaphore and MidiRoster() will unblock.
 
-	initLock = create_sem(0, NULL);
+	initLock = create_sem(0, "InitLock");
 
 	if (initLock < B_OK) 
 	{