diff --git a/intern/cycles/blender/addon/ui.py b/intern/cycles/blender/addon/ui.py
index 6353bf37a15..c82ab9ce624 100644
--- a/intern/cycles/blender/addon/ui.py
+++ b/intern/cycles/blender/addon/ui.py
@@ -606,6 +606,7 @@ class CyclesMaterial_PT_settings(CyclesButtonsPanel, Panel):
 
         col = split.column()
         col.prop(cmat, "sample_as_light")
+        col.prop(mat, "pass_index")
 
 
 class CyclesTexture_PT_context(CyclesButtonsPanel, Panel):