diff --git a/source/blender/modifiers/intern/MOD_screw.cc b/source/blender/modifiers/intern/MOD_screw.cc
index 79ddf95e822..c0671a2b6a8 100644
--- a/source/blender/modifiers/intern/MOD_screw.cc
+++ b/source/blender/modifiers/intern/MOD_screw.cc
@@ -1021,6 +1021,7 @@ static Mesh *modify_mesh(ModifierData *md, const ModifierEvalContext *ctx, Mesh
 #endif
 
   sharp_faces.finish();
+  dst_material_index.finish();
 
   if (edge_face_map) {
     MEM_freeN(edge_face_map);
@@ -1040,8 +1041,6 @@ static Mesh *modify_mesh(ModifierData *md, const ModifierEvalContext *ctx, Mesh
                                          ltmd->merge_dist);
   }
 
-  dst_material_index.finish();
-
   return result;
 }