diff --git a/intern/cycles/render/bssrdf.cpp b/intern/cycles/render/bssrdf.cpp
index 91064fe45ba..f3f889f071a 100644
--- a/intern/cycles/render/bssrdf.cpp
+++ b/intern/cycles/render/bssrdf.cpp
@@ -38,6 +38,8 @@ static float cdf_lookup_inverse(const vector<float>& table, float2 range, float
 
 	if(index == 0)
 		return range[0];
+	else if(index == table.size())
+		return range[1];
 	else
 		index--;