diff --git a/src/emitters/sky.cpp b/src/emitters/sky.cpp
index b86f2fd11..101c10792 100644
--- a/src/emitters/sky.cpp
+++ b/src/emitters/sky.cpp
@@ -231,7 +231,7 @@ class SkyEmitter final : public Emitter<Float, Spectrum> {
             } else {
                 for (int i=0; i<SpectrumSamples; ++i) {
                     // note: arbitrary number of samples not supported for vector eval at the moment
-                    Float band = srgb_model_eval< mitsuba::Spectrum<ScalarFloat, 1> >(m_albedo, m_wavelengths[i])[0];
+                    ScalarFloat band = srgb_model_eval< mitsuba::Spectrum<ScalarFloat, 1> >(m_albedo, m_wavelengths[i])[0];
                     m_state[i] = arhosekskymodelstate_alloc_init(
                         m_turbidity, band, sunElevation);
                 }