diff --git a/src/stream.cpp b/src/stream.cpp
--- a/src/stream.cpp
+++ b/src/stream.cpp
@@ -25,6 +25,7 @@
 
 Stream::Stream(QObject *parent)
     : VolumeObject(parent)
+    , m_deviceIndex(PA_INVALID_INDEX)
     , m_clientIndex(PA_INVALID_INDEX)
     , m_virtualStream(false)
     , m_corked(false)