diff --git a/src/pbrt/cpu/integrators.cpp b/src/pbrt/cpu/integrators.cpp
index c2fffd02..64eaf983 100644
--- a/src/pbrt/cpu/integrators.cpp
+++ b/src/pbrt/cpu/integrators.cpp
@@ -420,6 +420,7 @@ SampledSpectrum SimplePathIntegrator::Li(RayDifferential ray, SampledWavelengths
         // Get BSDF and skip over medium boundaries
         BSDF bsdf = isect.GetBSDF(ray, lambda, camera, scratchBuffer, sampler);
         if (!bsdf) {
+            specularBounce = true;
             isect.SkipIntersection(&ray, si->tHit);
             continue;
         }
@@ -677,6 +678,7 @@ SampledSpectrum PathIntegrator::Li(RayDifferential ray, SampledWavelengths &lamb
         // Get BSDF and skip over medium boundaries
         BSDF bsdf = isect.GetBSDF(ray, lambda, camera, scratchBuffer, sampler);
         if (!bsdf) {
+            specularBounce = true;  // disable MIS if the indirect ray hits a light
             isect.SkipIntersection(&ray, si->tHit);
             continue;
         }