diff --git a/src/olympic/studio/modlib/include/studio/editor.hpp b/src/olympic/studio/modlib/include/studio/editor.hpp
index 59b7e2f0..31421dcb 100644
--- a/src/olympic/studio/modlib/include/studio/editor.hpp
+++ b/src/olympic/studio/modlib/include/studio/editor.hpp
@@ -134,11 +134,13 @@ class Editor: public studio::BaseEditor {
 		void pushCommand(ox::UPtr<UndoCommand> &&cmd) noexcept;
 
 		template<typename UC, typename ...Args>
-		void pushCommand(Args&&... args) noexcept {
+		bool pushCommand(Args&&... args) noexcept {
 			try {
 				m_undoStack.push(ox::make_unique<UC>(ox::forward<Args>(args)...));
+				return true;
 			} catch (ox::Exception const&ex) {
 				oxLogError(ex.toError());
+				return false;
 			}
 		}
 
diff --git a/src/olympic/studio/modlib/include/studio/undocommand.hpp b/src/olympic/studio/modlib/include/studio/undocommand.hpp
index 9f7bb845..93e04f13 100644
--- a/src/olympic/studio/modlib/include/studio/undocommand.hpp
+++ b/src/olympic/studio/modlib/include/studio/undocommand.hpp
@@ -4,8 +4,15 @@
 
 #pragma once
 
+#include <ox/std/error.hpp>
+
 namespace studio {
 
+class NoChangesException: public ox::Exception {
+	public:
+		inline NoChangesException(): ox::Exception(OxError(1, "Command makes no changes.")) {}
+};
+
 class UndoCommand {
 	public:
 		virtual ~UndoCommand() noexcept = default;