--- pfstmo-1.4/src/mantiuk08/display_adaptive_tmo.cpp	2026-10-18 15:25:32.935613550 +0200
+++ pfstmo-1.4/src/mantiuk08/display_adaptive_tmo.cpp	2026-10-18 15:25:32.937918786 +0200
@@ -355,7 +355,7 @@ void print_vector( gsl_vector *v )
 class conditional_density: public datmoConditionalDensity
 {
 public:
-  static const double l_min = -8.f, l_max = 8.f, delta = 0.1f;
+  static constexpr double l_min = -8.f, l_max = 8.f, delta = 0.1f;
   static double x_scale[X_COUNT];    // input log luminance scale
   double *g_scale;    // contrast scale
   double *f_scale;    // frequency scale