diff --git a/gtk-gui.c b/gtk-gui.c
index 351e7b9f4..b28ca2513 100644
--- a/gtk-gui.c
+++ b/gtk-gui.c
@@ -989,7 +989,7 @@ void update_progressbar(progressbar_t *progress, double value)
 
 void set_filename(const char *filename)
 {
-	if (filename)
+	if (!existing_filename && filename)
 		existing_filename = strdup(filename);
 	return;
 }