diff --git a/src/copy.c b/src/copy.c
index 1a1b63e..e57f285 100644
--- a/src/copy.c
+++ b/src/copy.c
@@ -89,6 +89,8 @@ static int _copy(Prefs * prefs, unsigned int filec, char * filev[])
 	GtkWidget * widget;
 	PangoFontDescription * bold;
 
+	if(filec < 2 || filev == NULL)
+		return 1; /* FIXME report error */
 	copy.prefs = prefs;
 	copy.filec = filec;
 	copy.filev = filev;
diff --git a/src/move.c b/src/move.c
index 1a1d6f5..61952ca 100644
--- a/src/move.c
+++ b/src/move.c
@@ -56,13 +56,15 @@ static void _move_on_closex(GtkWidget * widget, GdkEvent * event,
 		gpointer data);
 static gboolean _move_idle_first(gpointer data);
 
-static int _move(Prefs * prefs, int filec, char * filev[])
+static int _move(Prefs * prefs, unsigned int filec, char * filev[])
 {
 	static Move move;
 	GtkWidget * vbox;
 	GtkWidget * hbox;
 	GtkWidget * widget;
 
+	if(filec < 2 || filev == NULL)
+		return 1; /* FIXME report error */
 	move.prefs = prefs;
 	move.filec = filec;
 	move.filev = filev;