diff --git a/gui/lineshader.h b/gui/lineshader.h
index 9d2524b3..784f35a8 100644
--- a/gui/lineshader.h
+++ b/gui/lineshader.h
@@ -170,6 +170,7 @@ class LineShader
 
   public:
     LineShader(QObject *parent) : parent_(parent), program_(nullptr) {}
+    ~LineShader() { ((QOpenGLWidget*) parent_)->makeCurrent(); }
 
     static constexpr const char *vertexShaderSource_ =
             "#version 150\n"