diff --git a/src/bsdfs/measured_polarized.cpp b/src/bsdfs/measured_polarized.cpp
index ec6e5067c..96724e892 100644
--- a/src/bsdfs/measured_polarized.cpp
+++ b/src/bsdfs/measured_polarized.cpp
@@ -183,7 +183,7 @@ class MeasuredPolarized final : public BSDF<Float, Spectrum> {
         Float cos_theta_i = Frame3f::cos_theta(si.wi);
         active &= cos_theta_i > 0.f;
 
-        BSDFSample3f bs;
+        BSDFSample3f bs = dr::zeros<BSDFSample3f>();
         if (unlikely(dr::none_or<false>(active) || !ctx.is_enabled(BSDFFlags::GlossyReflection)))
             return { bs, 0.f };