diff --git a/src/kits/midi/MidiStore.cpp b/src/kits/midi/MidiStore.cpp
index cc93577027..e8958d8776 100644
--- a/src/kits/midi/MidiStore.cpp
+++ b/src/kits/midi/MidiStore.cpp
@@ -436,8 +436,8 @@ void BMidiStore::Run()
 	paused = false;
 	finished = false;
 	
-	int32 timeAdjust;
-	uint32 baseTime;
+	int32 timeAdjust = 0;
+	uint32 baseTime = 0;
 	bool firstEvent = true;
 	bool resetTime = false;
 
@@ -980,8 +980,8 @@ void BMidiStore::WriteTrack()
 	Write32Bit(0);
 
 	byteCount = 0;
-	uint32 oldTime;
-	uint32 newTime;
+	uint32 oldTime = 0;
+	uint32 newTime = 0;
 
 	for (uint32 t = 0; t < CountEvents(); ++t)
 	{
diff --git a/src/kits/midi2/MidiLocalProducer.cpp b/src/kits/midi2/MidiLocalProducer.cpp
index d670cb6171..16977d46bc 100644
--- a/src/kits/midi2/MidiLocalProducer.cpp
+++ b/src/kits/midi2/MidiLocalProducer.cpp
@@ -230,7 +230,7 @@ void BMidiLocalProducer::SpraySystemExclusive(
 void BMidiLocalProducer::SpraySystemCommon(
 	uchar status, uchar data1, uchar data2, bigtime_t time) const
 {
-	size_t len;
+	size_t len = 0;
 	uchar data[3];
 	data[0] = status;
 	data[1] = data1;