diff --git a/source/blender/blenkernel/intern/object.c b/source/blender/blenkernel/intern/object.c
index 274f0394618..e3bb384ffcc 100644
--- a/source/blender/blenkernel/intern/object.c
+++ b/source/blender/blenkernel/intern/object.c
@@ -5772,6 +5772,14 @@ void BKE_object_replace_data_on_shallow_copy(Object *ob, ID *new_data)
 
 bool BKE_object_supports_material_slots(struct Object *ob)
 {
-  return ELEM(
-      ob->type, OB_MESH, OB_CURVE, OB_SURF, OB_FONT, OB_MBALL, OB_HAIR, OB_POINTCLOUD, OB_VOLUME);
+  return ELEM(ob->type,
+              OB_MESH,
+              OB_CURVE,
+              OB_SURF,
+              OB_FONT,
+              OB_MBALL,
+              OB_HAIR,
+              OB_POINTCLOUD,
+              OB_VOLUME,
+              OB_GPENCIL);
 }