diff --git a/src/mainwindow.cc b/src/mainwindow.cc
index 1ae0fb0..7e49e36 100644
--- a/src/mainwindow.cc
+++ b/src/mainwindow.cc
@@ -606,7 +606,9 @@ void MainWindow::updateSourceOutput(const pa_source_output_info &info) {
         w = sourceOutputWidgets[info.index];
     else {
         sourceOutputWidgets[info.index] = w = SourceOutputWidget::create(this);
+#if HAVE_SOURCE_OUTPUT_VOLUMES
         w->setChannelMap(info.channel_map, true);
+#endif
         recsVBox->pack_start(*w, false, false, 0);
         w->index = info.index;
         w->clientIndex = info.client;