diff --git a/sdrgui/gui/glshaderspectrogram.cpp b/sdrgui/gui/glshaderspectrogram.cpp
index 8fd07b3c0..151c9dddd 100644
--- a/sdrgui/gui/glshaderspectrogram.cpp
+++ b/sdrgui/gui/glshaderspectrogram.cpp
@@ -514,6 +514,8 @@ void GLShaderSpectrogram::drawSurface(SpectrumSettings::SpectrogramStyle style,
 
 void GLShaderSpectrogram::cleanup()
 {
+    delete m_vao;
+    m_vao  = nullptr;
     delete m_programShaded;
     m_programShaded = nullptr;
     delete m_programSimple;