diff --git a/sdrgui/gui/glspectrum.cpp b/sdrgui/gui/glspectrum.cpp
index 87c0d0d50..816d57567 100644
--- a/sdrgui/gui/glspectrum.cpp
+++ b/sdrgui/gui/glspectrum.cpp
@@ -2581,7 +2581,9 @@ void GLSpectrum::applyChanges()
         m_waterfallBuffer = new QImage(m_nbBins, m_waterfallHeight, QImage::Format_ARGB32);
 
         m_waterfallBuffer->fill(qRgb(0x00, 0x00, 0x00));
-        m_glShaderWaterfall.initTexture(*m_waterfallBuffer);
+        if (m_waterfallHeight > 0) {
+            m_glShaderWaterfall.initTexture(*m_waterfallBuffer);
+        }
         m_waterfallBufferPos = 0;
 
         if (m_3DSpectrogramBuffer) {
@@ -2591,7 +2593,9 @@ void GLSpectrum::applyChanges()
         m_3DSpectrogramBuffer = new QImage(m_nbBins, m_waterfallHeight, QImage::Format_Grayscale8);
 
         m_3DSpectrogramBuffer->fill(qRgb(0x00, 0x00, 0x00));
-        m_glShaderSpectrogram.initTexture(*m_3DSpectrogramBuffer);
+        if (m_waterfallHeight > 0) {
+            m_glShaderSpectrogram.initTexture(*m_3DSpectrogramBuffer);
+        }
         m_3DSpectrogramBufferPos = 0;
     }
     m_glShaderSpectrogram.initColorMapTexture(m_3DSpectrogramColorMap);