diff --git a/src/jasper/modules/world/src/studio/worldeditor/commands/editsize.cpp b/src/jasper/modules/world/src/studio/worldeditor/commands/editsize.cpp
index 2131acf..0a8d1d1 100644
--- a/src/jasper/modules/world/src/studio/worldeditor/commands/editsize.cpp
+++ b/src/jasper/modules/world/src/studio/worldeditor/commands/editsize.cpp
@@ -38,9 +38,8 @@ bool EditWorldSizeCommand::mergeWith(studio::UndoCommand const&cmd) noexcept {
 	m_newSize = es->m_newSize;
 	// undo
 	resize(m_doc, m_oldSize);
-	m_doc.tiles = std::move(m_oldMap);
+	m_doc.tiles = m_oldMap;
 	// redo
-	m_oldMap = m_doc.tiles;
 	resize(m_doc, m_newSize);
 	oxLogError(loadWorldStatic(m_objCache, m_doc).moveTo(m_worldStatic));
 	return true;