diff --git a/demboyz/io/voicewriter/voicedatawriter.cpp b/demboyz/io/voicewriter/voicedatawriter.cpp
index 0babcef..7613fda 100644
--- a/demboyz/io/voicewriter/voicedatawriter.cpp
+++ b/demboyz/io/voicewriter/voicedatawriter.cpp
@@ -139,8 +139,8 @@ private:
 
 private:
     CELTDecoder* m_celtDecoder = NULL;
-    uint32_t m_frameSizeSamples;
-    uint32_t m_encodedFrameSizeBytes;
+    uint32_t m_frameSizeSamples = 0;
+    uint32_t m_encodedFrameSizeBytes = 0;
 };
 
 #endif // USE_VAUDIO_CELT
@@ -162,7 +162,7 @@ private:
     struct PlayerVoiceState
     {
 #ifdef USE_VAUDIO_CELT
-        IVoiceCodec* celtDecoder;
+        IVoiceCodec* celtDecoder = nullptr;
 #else
         CeltVoiceDecoder decoder;
 #endif
diff --git a/demboyz/io/voicewriter/wavfilewriter.h b/demboyz/io/voicewriter/wavfilewriter.h
index c367581..14274d5 100644
--- a/demboyz/io/voicewriter/wavfilewriter.h
+++ b/demboyz/io/voicewriter/wavfilewriter.h
@@ -9,7 +9,8 @@ class WaveFileWriter
 {
 public:
     WaveFileWriter():
-        m_file(nullptr)
+        m_file(nullptr),
+        m_DataBytes(0)
     {
     }