diff --git a/src/gui/spectrum.cc b/src/gui/spectrum.cc
index 8bc8775..03c1361 100644
--- a/src/gui/spectrum.cc
+++ b/src/gui/spectrum.cc
@@ -47,6 +47,9 @@ Spectrum::config(const Config &src_cfg) {
       << " # averages: " << _Ntrafo << std::endl
       << " refresh rate: " << _sample_rate/(_N_samples*_Ntrafo) << "Hz";
   Logger::get().log(msg);
+
+  // Signal spectrum reconfiguration
+  emit spectrumConfigured();
 }
 
 
diff --git a/src/gui/spectrum.hh b/src/gui/spectrum.hh
index dd9aca1..2780d77 100644
--- a/src/gui/spectrum.hh
+++ b/src/gui/spectrum.hh
@@ -48,6 +48,8 @@ public:
 signals:
   /** Gets emitted once the spectrum was updated. */
   void spectrumUpdated();
+  /** Gets emitted once the spectrum was reconfigured. */
+  void spectrumConfigured();
 
 protected:
   /** Updates the FFT in the _compute buffer. */
diff --git a/src/gui/spectrumview.cc b/src/gui/spectrumview.cc
index 24ef296..395a660 100644
--- a/src/gui/spectrumview.cc
+++ b/src/gui/spectrumview.cc
@@ -22,6 +22,7 @@ SpectrumView::SpectrumView(Spectrum *spectrum, QWidget *parent)
 
   // Connect to update signal
   QObject::connect(_spectrum, SIGNAL(spectrumUpdated()), this, SLOT(update()));
+  QObject::connect(_spectrum, SIGNAL(spectrumConfigured()), this, SLOT(update()));
 }
 
 SpectrumView::~SpectrumView() {
diff --git a/src/gui/waterfallview.cc b/src/gui/waterfallview.cc
index ba00f71..a2e2ed2 100644
--- a/src/gui/waterfallview.cc
+++ b/src/gui/waterfallview.cc
@@ -87,6 +87,7 @@ WaterFallView::WaterFallView(Spectrum *spectrum, size_t height, QWidget *parent)
 
   // Get notified once a new spectrum is available:
   QObject::connect(_spectrum, SIGNAL(spectrumUpdated()), this, SLOT(_onSpectrumUpdated()));
+  QObject::connect(_spectrum, SIGNAL(spectrumConfigured()), this, SLOT(update()));
 }
 
 void