diff --git a/src/jasper/modules/world/src/studio/worldeditor/worldeditor-imgui.cpp b/src/jasper/modules/world/src/studio/worldeditor/worldeditor-imgui.cpp
index 2044ef5..5d8e9ab 100644
--- a/src/jasper/modules/world/src/studio/worldeditor/worldeditor-imgui.cpp
+++ b/src/jasper/modules/world/src/studio/worldeditor/worldeditor-imgui.cpp
@@ -195,7 +195,7 @@ void WorldEditorImGui::drawObjSelector() noexcept {
 		m_objSetPicker.open();
 	}
 	ImGui::SameLine();
-	ImGui::BeginDisabled(m_objMgr.selectedObjSet.len() == 0);
+	ImGui::BeginDisabled(m_objMgr.selectedObjSet.size() == 0);
 	if (ig::PushButton("-", SqrBtnSize)) {
 		rmObjSet();
 	}