diff --git a/sources/projectview.cpp b/sources/projectview.cpp
index e40192dab..5249ab288 100644
--- a/sources/projectview.cpp
+++ b/sources/projectview.cpp
@@ -233,8 +233,10 @@ bool ProjectView::tryClosingElementEditors() {
 int ProjectView::tryClosingDiagrams() {
 	if (!project_) return(QDialogButtonBox::DestructiveRole);
 	
+	bool project_modified = project_ -> projectOptionsWereModified();
 	QList<Diagram *> modified_diagrams = getDiagrams(AllDiagrams | ModifiedDiagramsOnly);
-	if (!modified_diagrams.count() && !project_ -> filePath().isEmpty()) {
+	bool has_filepath = !project_ -> filePath().isEmpty();
+	if (!project_modified && !modified_diagrams.count() && has_filepath) {
 		// nothing was modified, and we have a filepath, i.e. everything was already
 		// saved, i.e we can close the project right now
 		return(QDialogButtonBox::DestructiveRole);
diff --git a/sources/qetproject.cpp b/sources/qetproject.cpp
index 3eac94bbd..cb50d896f 100644
--- a/sources/qetproject.cpp
+++ b/sources/qetproject.cpp
@@ -843,6 +843,7 @@ void QETProject::diagramOrderChanged(int old_index, int new_index) {
 	
 	diagrams_.move(old_index, new_index);
 	updateDiagramsFolioData();
+	setModified(true);
 	emit(projectDiagramsOrderChanged(this, old_index, new_index));
 }
 
@@ -1146,7 +1147,7 @@ NamesList QETProject::namesListForIntegrationCategory() {
 
 /**
 	@return true if project options (title, project-wide properties, settings
-	for new diagrams, ...) were modified, false otherwise.
+	for new diagrams, diagrams order...) were modified, false otherwise.
 */
 bool QETProject::projectOptionsWereModified() {
 	// unlike similar methods, this method does not compare the content against