diff --git a/src/gui_motif.c b/src/gui_motif.c
index ed2cfec..1863fa6 100644
--- a/src/gui_motif.c
+++ b/src/gui_motif.c
@@ -3525,7 +3525,7 @@
 	char_u	*save_cpo = p_cpo;
 
 	// No need to be Vi compatible here.
-	p_cpo = (char_u *)"";
+	p_cpo = empty_options;
 	u_undo(1);
 	p_cpo = save_cpo;
 	gui_update_screen();