diff --git a/gtk3/main.c b/gtk3/main.c
index 4578169..f0d6739 100644
--- a/gtk3/main.c
+++ b/gtk3/main.c
@@ -1066,7 +1066,7 @@ static void run(GApplication *app, UserData *user_data) {
 
 int main(int argc, char *argv[]) {
 	// Create our GApplication and tell GTK that we are able to handle files
-	main_application = gtk_application_new(APP_ID, G_APPLICATION_HANDLES_OPEN);
+	main_application = gtk_application_new(APP_ID, G_APPLICATION_NON_UNIQUE | G_APPLICATION_HANDLES_OPEN);
 
 	// Define our command line parameters
 	GOptionEntry entries[] = {