diff --git a/src/object/sp-item-group.cpp b/src/object/sp-item-group.cpp
index 2abfbeca5c82a2f7c0f048269a1391b4675ff782..8463e4b8b6e8262585269eab1b1483ee1f510ee5 100644
--- a/src/object/sp-item-group.cpp
+++ b/src/object/sp-item-group.cpp
@@ -748,7 +748,7 @@ sp_item_group_ungroup (SPGroup *group, std::vector<SPItem*> &children)
         clip->deleteObject(true, false);
     }
     prefs->setBool("/options/maskobject/topmost", topmost);
-    prefs->setBool("/options/maskobject/grouping", grouping);
+    prefs->setInt("/options/maskobject/grouping", grouping);
     prefs->setBool("/options/onungroup", false);
 }