diff --git a/src/volumeobject.h b/src/volumeobject.h
--- a/src/volumeobject.h
+++ b/src/volumeobject.h
@@ -49,7 +49,7 @@
             m_muted = info->mute;
             emit mutedChanged();
         }
-        if (memcmp(&m_volume, &info->volume, sizeof(pa_cvolume)) != 0) {
+        if (pa_cvolume_equal(&m_volume, &info->volume) != 0) {
             m_volume = info->volume;
             emit volumeChanged();
             emit channelVolumesChanged();
diff --git a/src/volumeobject.cpp b/src/volumeobject.cpp
--- a/src/volumeobject.cpp
+++ b/src/volumeobject.cpp
@@ -29,6 +29,7 @@
     , m_hasVolume(true)
     , m_volumeWritable(true)
 {
+    pa_cvolume_init(&m_volume);
 }
 
 VolumeObject::~VolumeObject()